From 71f1022dea5bd29061fabf22337d68fb5bc97b14 Mon Sep 17 00:00:00 2001
From: rogerwang2008 <rogerwang2008@163.com>
Date: Mon, 28 Sep 2026 14:05:06 +0800
Subject: [PATCH] some programs!!

---
 .idea/workspace.xml                           | 580 +++++++++++-------
 CMakeLists.txt                                |   2 +-
 _others/others_test.c.cpp                     |  50 ++
 _others/qyz/gdbh.cpp                          |  43 --
 _others/qyz/test.cpp                          |  18 -
 ...actions.cpp => dh_00_05_sum_fractions.cpp} |   0
 ...mbers.cpp => dh_00_10_smaller_numbers.cpp} |   0
 ..._init.py => dh_00_11_count_digits_init.py} |   0
 ...hange.cpp => dh_00_12_bottle_exchange.cpp} |   0
 ...20260909_13_flip.cpp => dh_00_13_flip.cpp} |   0
 ...encryption.cpp => dh_00_14_encryption.cpp} |   0
 ..._15_jusephus.cpp => dh_00_15_jusephus.cpp} |   0
 ...6_swap_bits.cpp => dh_00_16_swap_bits.cpp} |   0
 cs101/{dh_20260917_01.cpp => dh_01_01.cpp}    |   0
 ...0917_02_subway.cpp => dh_01_02_subway.cpp} |   0
 cs101/{dh_20260917_03.cpp => dh_01_03.cpp}    |   0
 cs101/{dh_20260917_04.cpp => dh_01_04.cpp}    |   0
 ...20260917_05_vote.cpp => dh_01_05_vote.cpp} |   0
 ..._or_walk.cpp => dh_03_01_bike_or_walk.cpp} |   0
 ...ngles.cpp => dh_03_02_draw_rectangles.cpp} |   0
 cs101/{dh_20260923_03.cpp => dh_03_03.cpp}    |   0
 ...260923_04_lamps.cpp => dh_03_04_lamps.cpp} |   0
 cs101/dh_03_05_perfect_cubes.cpp              |  54 ++
 cs101/dh_04_01_fibonacci.cpp                  |  31 +
 cs101/dh_04_04_balloons_init1.py              |  17 +
 cs101/sh_04_04_balloons.cpp                   |  26 +
 .../dsa_0201_dictionary.cpp                   |   0
 .../dsa_0202_card_stacking.cpp                |   0
 .../dsa_0203_string_insertion.cpp             |   0
 .../dsa_0204_prefix_cycle.cpp                 |   0
 .../dsa_0205_polynomial_addition.cpp          |   0
 .../dsa_0206_binary_query.cpp                 |   0
 .../dsa_0217_magic_square.cpp                 |   0
 .../dsa_0301_sliding_window.cpp               | 111 ++++
 .../dsa_0301_sliding_window_SLOW.cpp          |  38 ++
 dsa/ch3_stack_queue/dsa_0302_calculator.cpp   | 165 +++++
 .../dsa_0302_calculator_WRONG.cpp             | 137 +++++
 .../dsa_0306_stack_operation.cpp              |  46 ++
 38 files changed, 1037 insertions(+), 281 deletions(-)
 create mode 100644 _others/others_test.c.cpp
 delete mode 100644 _others/qyz/gdbh.cpp
 delete mode 100644 _others/qyz/test.cpp
 rename cs101/{dh_20260909_05_sum_fractions.cpp => dh_00_05_sum_fractions.cpp} (100%)
 rename cs101/{dh_20260909_10_smaller_numbers.cpp => dh_00_10_smaller_numbers.cpp} (100%)
 rename cs101/{dh_20260909_11_count_digits_init.py => dh_00_11_count_digits_init.py} (100%)
 rename cs101/{dh_20260909_12_bottle_exchange.cpp => dh_00_12_bottle_exchange.cpp} (100%)
 rename cs101/{dh_20260909_13_flip.cpp => dh_00_13_flip.cpp} (100%)
 rename cs101/{dh_20260909_14_encryption.cpp => dh_00_14_encryption.cpp} (100%)
 rename cs101/{dh_20260909_15_jusephus.cpp => dh_00_15_jusephus.cpp} (100%)
 rename cs101/{dh_20260909_16_swap_bits.cpp => dh_00_16_swap_bits.cpp} (100%)
 rename cs101/{dh_20260917_01.cpp => dh_01_01.cpp} (100%)
 rename cs101/{dh_20260917_02_subway.cpp => dh_01_02_subway.cpp} (100%)
 rename cs101/{dh_20260917_03.cpp => dh_01_03.cpp} (100%)
 rename cs101/{dh_20260917_04.cpp => dh_01_04.cpp} (100%)
 rename cs101/{dh_20260917_05_vote.cpp => dh_01_05_vote.cpp} (100%)
 rename cs101/{dh_20260923_01_bike_or_walk.cpp => dh_03_01_bike_or_walk.cpp} (100%)
 rename cs101/{dh_20260923_02_draw_rectangles.cpp => dh_03_02_draw_rectangles.cpp} (100%)
 rename cs101/{dh_20260923_03.cpp => dh_03_03.cpp} (100%)
 rename cs101/{dh_20260923_04_lamps.cpp => dh_03_04_lamps.cpp} (100%)
 create mode 100644 cs101/dh_03_05_perfect_cubes.cpp
 create mode 100644 cs101/dh_04_01_fibonacci.cpp
 create mode 100644 cs101/dh_04_04_balloons_init1.py
 create mode 100644 cs101/sh_04_04_balloons.cpp
 rename dsa/{linear_list => ch2_linear_list}/dsa_0201_dictionary.cpp (100%)
 rename dsa/{linear_list => ch2_linear_list}/dsa_0202_card_stacking.cpp (100%)
 rename dsa/{linear_list => ch2_linear_list}/dsa_0203_string_insertion.cpp (100%)
 rename dsa/{linear_list => ch2_linear_list}/dsa_0204_prefix_cycle.cpp (100%)
 rename dsa/{linear_list => ch2_linear_list}/dsa_0205_polynomial_addition.cpp (100%)
 rename dsa/{linear_list => ch2_linear_list}/dsa_0206_binary_query.cpp (100%)
 rename dsa/{linear_list => ch2_linear_list}/dsa_0217_magic_square.cpp (100%)
 create mode 100644 dsa/ch3_stack_queue/dsa_0301_sliding_window.cpp
 create mode 100644 dsa/ch3_stack_queue/dsa_0301_sliding_window_SLOW.cpp
 create mode 100644 dsa/ch3_stack_queue/dsa_0302_calculator.cpp
 create mode 100644 dsa/ch3_stack_queue/dsa_0302_calculator_WRONG.cpp
 create mode 100644 dsa/ch3_stack_queue/dsa_0306_stack_operation.cpp

diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index c281a00..68352ba 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -23,22 +23,24 @@
       <config projectName="exercises" targetName="cs101__dh_20260923_01_bike_or_walk" />
       <config projectName="exercises" targetName="pojcs101_M02692_12_coins" />
       <config projectName="exercises" targetName="graph__ECNA2001_sort_letters" />
+      <config projectName="exercises" targetName="dsa__ch2_linear_list__dsa_0205_polynomial_addition" />
       <config projectName="exercises" targetName="pojcs101_T12559_biggest_smallest_combination" />
       <config projectName="exercises" targetName="pojcs101_T12559_biggest_smallest_combination_WRONG" />
       <config projectName="exercises" targetName="pojcs101_E02883" />
+      <config projectName="exercises" targetName="dsa__ch2_linear_list__dsa_0217_magic_square" />
       <config projectName="exercises" targetName="pojcs101_M02694_polish_notation_tree" />
-      <config projectName="exercises" targetName="dsa__linear_list__dsa_0204_prefix_cycle" />
       <config projectName="exercises" targetName="pojcs101_M01017_6_boxes" />
       <config projectName="exercises" targetName="cs101__dh_20260917_03" />
       <config projectName="exercises" targetName="dp__backpack_dp__NOIP2005J_herbs_dp_knapsack_MWASTE" />
-      <config projectName="exercises" targetName="dsa__linear_list__dsa_0217_magic_square" />
       <config projectName="exercises" targetName="dp__backpack_dp__NOIP2006S_jinming_budget_dp_knapsack" />
       <config projectName="exercises" targetName="cs101__dh_20260923_03" />
       <config projectName="exercises" targetName="dp__backpack_dp__NOIP2005J_herbs_dp_knapsack_PINGPONG" />
+      <config projectName="exercises" targetName="cs101__dh_20260923_04_lamps" />
       <config projectName="exercises" targetName="JLOI2009_binary_tree_GIVEUP" />
-      <config projectName="exercises" targetName="_others__qyz__gdbh" />
+      <config projectName="exercises" targetName="dsa__ch3_stack_queue__dsa_0306_stack_operation" />
       <config projectName="exercises" targetName="cs101__dh_20260909_16_swap_bits" />
       <config projectName="exercises" targetName="pojcs101_M03704_brackets" />
+      <config projectName="exercises" targetName="dsa__ch3_stack_queue__dsa_0301_sliding_window_SLOW" />
       <config projectName="exercises" targetName="luogu_ez_B3628" />
       <config projectName="exercises" targetName="dp__TJOI2007_walk_segments_dp" />
       <config projectName="exercises" targetName="pojcs101_M03441_sum_zero" />
@@ -50,6 +52,7 @@
       <config projectName="exercises" targetName="graph__luogu_P3916_graph_iteration" />
       <config projectName="exercises" targetName="_others__jzh__jzh_c1_h" />
       <config projectName="exercises" targetName="dp__NOIP1996S_miner_dp_MWASTE" />
+      <config projectName="exercises" targetName="dsa__ch2_linear_list__dsa_0204_prefix_cycle" />
       <config projectName="exercises" targetName="pojcs101_T01011_sticks" />
       <config projectName="exercises" targetName="cs101__dh_20260909_15_jusephus" />
       <config projectName="exercises" targetName="pojcs101_M02431_cows_gas_leak_WRONG" />
@@ -61,18 +64,20 @@
       <config projectName="exercises" targetName="cs101__dh_20260909_05_sum_fractions" />
       <config projectName="exercises" targetName="pojcs101_E01003" />
       <config projectName="exercises" targetName="cs101__dh_20260909_14_encryption" />
+      <config projectName="exercises" targetName="dsa__ch3_stack_queue__dsa_0302_calculator" />
       <config projectName="exercises" targetName="JLOI2009_binary_tree" />
       <config projectName="exercises" targetName="pojcs101_M03532" />
+      <config projectName="exercises" targetName="dsa__ch2_linear_list__dsa_0206_binary_query" />
       <config projectName="exercises" targetName="pojcs101_M01321_chest_grid" />
       <config projectName="exercises" targetName="cs101__dh_20260917_01" />
+      <config projectName="exercises" targetName="dsa__ch2_linear_list__dsa_0203_string_insertion" />
+      <config projectName="exercises" targetName="cs101__dh_20260923_05_perfect_cubes" />
       <config projectName="exercises" targetName="pojcs101_T04117_split_int" />
       <config projectName="exercises" targetName="pojcs101_T27373_biggest_combination_t2_TLE" />
       <config projectName="exercises" targetName="cs101__dh_20260909_13_flip" />
-      <config projectName="exercises" targetName="dsa__linear_list__dsa_0205_polynomial_addition" />
       <config projectName="exercises" targetName="cs101__dh_20260923_02_draw_rectangles" />
       <config projectName="exercises" targetName="pojcs101_M01002_memorable_number" />
       <config projectName="exercises" targetName="pojcs101_M02524_ubiquitous_religions_dsu" />
-      <config projectName="exercises" targetName="dsa__linear_list__dsa_0206_binary_query" />
       <config projectName="exercises" targetName="pojcs101_M03247_palindromic_prime" />
       <config projectName="exercises" targetName="SHOI2002_ski" />
       <config projectName="exercises" targetName="pojcs101_E01218" />
@@ -81,66 +86,75 @@
       <config projectName="exercises" targetName="dp__SHOI2002_ski_dp" />
       <config projectName="exercises" targetName="cs101__dh_20260917_05_vote" />
       <config projectName="exercises" targetName="_others__jzh__jzh_e2_j" />
+      <config projectName="exercises" targetName="dsa__ch2_linear_list__dsa_0201_dictionary" />
       <config projectName="exercises" targetName="cs101__dh_20260909_10_smaller_numbers" />
+      <config projectName="exercises" targetName="dsa__ch3_stack_queue__dsa_0301_sliding_window" />
       <config projectName="exercises" targetName="pojcs101_T01011_sticks_WRONG" />
       <config projectName="exercises" targetName="pojcs101_M01852_ants_falling" />
+      <config projectName="exercises" targetName="cs101__dh_20260923_11_fibonacci" />
+      <config projectName="exercises" targetName="cs101__sh_20260923_14_balloons" />
       <config projectName="exercises" targetName="graph__luogu_P3916_graph_iteration_WRONG" />
       <config projectName="exercises" targetName="SHOI2002_ski_WRONG" />
-      <config projectName="exercises" targetName="dsa__linear_list__dsa_0201_dictionary" />
+      <config projectName="exercises" targetName="dsa__ch3_stack_queue__dsa_0302_calculator_WRONG" />
       <config projectName="exercises" targetName="pojcs101_T27104_chicken_monitors" />
+      <config projectName="exercises" targetName="_others__others_test" />
       <config projectName="exercises" targetName="cs101__dh_20260917_04" />
       <config projectName="exercises" targetName="dp__backpack_dp__NOIP2005J_herbs_dp_knapsack_MWASTE_BETTER" />
-      <config projectName="exercises" targetName="dsa__linear_list__dsa_0202_card_stacking" />
       <config projectName="exercises" targetName="cmake-build-debug-gcc__CMakeFiles__4.3.1__CompilerIdCXX__CMakeCXXCompilerId" />
       <config projectName="exercises" targetName="NOIP2016J_bay" />
       <config projectName="exercises" targetName="lc_135_candy" />
       <config projectName="exercises" targetName="pojcs101_T27373_biggest_combination_t2" />
-      <config projectName="exercises" targetName="_others__qyz__test" />
-      <config projectName="exercises" targetName="dsa__linear_list__dsa_0203_string_insertion" />
       <config projectName="exercises" targetName="cs101__dh_20260909_11_count_digits" />
       <config projectName="exercises" targetName="pojcs101_M01328_radar_greedy_WRONG" />
       <config projectName="exercises" targetName="dp__backpack_dp__NOIP2005J_herbs_dp_knapsack" />
       <config projectName="exercises" targetName="graph__USACO06DECs_cow_picnic" />
       <config projectName="exercises" targetName="cs101__dh_20260917_02_subway" />
+      <config projectName="exercises" targetName="dsa__ch2_linear_list__dsa_0202_card_stacking" />
     </generated>
   </component>
   <component name="CMakeSettings" AUTO_RELOAD="true">
     <configurations />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="4491295e-723c-4e0b-b7b4-9be1cbde5db8" name="更改" comment="some programs">
-      <change afterPath="$PROJECT_DIR$/.clang-format" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/_others/jzh/jzh_c1_h.c" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260909_05_sum_fractions.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260909_10_smaller_numbers.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260909_11_count_digits_init.py" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260909_12_bottle_exchange.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260909_13_flip.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260909_14_encryption.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260909_15_jusephus.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260909_16_swap_bits.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260917_01.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260917_02_subway.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260917_03.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260917_04.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260917_05_vote.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260923_01_bike_or_walk.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260923_02_draw_rectangles.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260923_03.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/cs101/dh_20260923_04_lamps.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/dsa/linear_list/dsa_0202_card_stacking.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/dsa/linear_list/dsa_0203_string_insertion.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/dsa/linear_list/dsa_0204_prefix_cycle.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/dsa/linear_list/dsa_0205_polynomial_addition.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/dsa/linear_list/dsa_0206_binary_query.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/dsa/linear_list/dsa_0217_magic_square.cpp" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/graph/USACO06DECs_cow_picnic.cpp" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.gitignore" beforeDir="false" afterPath="$PROJECT_DIR$/.gitignore" afterDir="false" />
+    <list default="true" id="4491295e-723c-4e0b-b7b4-9be1cbde5db8" name="更改" comment="some programs!">
+      <change afterPath="$PROJECT_DIR$/_others/others_test.c.cpp" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/cs101/dh_03_05_perfect_cubes.cpp" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/cs101/dh_04_01_fibonacci.cpp" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/cs101/dh_04_04_balloons_init1.py" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/cs101/sh_04_04_balloons.cpp" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0301_sliding_window.cpp" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0301_sliding_window_SLOW.cpp" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0302_calculator.cpp" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0302_calculator_WRONG.cpp" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0306_stack_operation.cpp" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/CMakeLists.txt" beforeDir="false" afterPath="$PROJECT_DIR$/CMakeLists.txt" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/graph/ECNA2001_sort_letters.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/graph/ECNA2001_sort_letters.cpp" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/luogu_P1160_biodir_linked_list.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/luogu_P1160_biodir_linked_list.cpp" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/noi2001_food_chain_dsu.py" beforeDir="false" afterPath="$PROJECT_DIR$/NOI2001_food_chain_dsu.py" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/_others/qyz/gdbh.cpp" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/_others/qyz/test.cpp" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260909_05_sum_fractions.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_00_05_sum_fractions.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260909_10_smaller_numbers.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_00_10_smaller_numbers.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260909_11_count_digits_init.py" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_00_11_count_digits_init.py" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260909_12_bottle_exchange.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_00_12_bottle_exchange.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260909_13_flip.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_00_13_flip.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260909_14_encryption.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_00_14_encryption.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260909_15_jusephus.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_00_15_jusephus.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260909_16_swap_bits.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_00_16_swap_bits.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260917_01.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_01_01.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260917_02_subway.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_01_02_subway.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260917_03.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_01_03.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260917_04.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_01_04.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260917_05_vote.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_01_05_vote.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260923_01_bike_or_walk.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_03_01_bike_or_walk.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260923_02_draw_rectangles.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_03_02_draw_rectangles.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260923_03.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_03_03.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/cs101/dh_20260923_04_lamps.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/cs101/dh_03_04_lamps.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/dsa/linear_list/dsa_0201_dictionary.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/dsa/ch2_linear_list/dsa_0201_dictionary.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/dsa/linear_list/dsa_0202_card_stacking.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/dsa/ch2_linear_list/dsa_0202_card_stacking.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/dsa/linear_list/dsa_0203_string_insertion.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/dsa/ch2_linear_list/dsa_0203_string_insertion.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/dsa/linear_list/dsa_0204_prefix_cycle.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/dsa/ch2_linear_list/dsa_0204_prefix_cycle.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/dsa/linear_list/dsa_0205_polynomial_addition.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/dsa/ch2_linear_list/dsa_0205_polynomial_addition.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/dsa/linear_list/dsa_0206_binary_query.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/dsa/ch2_linear_list/dsa_0206_binary_query.cpp" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/dsa/linear_list/dsa_0217_magic_square.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/dsa/ch2_linear_list/dsa_0217_magic_square.cpp" afterDir="false" />
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@@ -159,8 +173,8 @@
       <list>
         <option value="C++ Single file program" />
         <option value="CMakeLists.txt" />
-        <option value="Python Script" />
         <option value="C++ Single file for OJ" />
+        <option value="Python Script" />
       </list>
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   </component>
@@ -173,6 +187,10 @@
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
   </component>
   <component name="HighlightingSettingsPerFile">
+    <setting file="file://$PROJECT_DIR$/cs101/dh_20260917_01.cpp" root0="FORCE_HIGHLIGHTING" />
+    <setting file="file://$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0301_sliding_window_SLOW.cpp" root0="FORCE_HIGHLIGHTING" />
+    <setting file="file://$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0301_sliding_window_WRONG.cpp" root0="FORCE_HIGHLIGHTING" />
+    <setting file="file://$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0302_calculator_WRONG.cpp" root0="FORCE_HIGHLIGHTING" />
     <setting file="mock:///dummy.cpp" root0="SKIP_HIGHLIGHTING" />
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@@ -246,7 +264,15 @@
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     "CMake 应用程序.cs101__dh_20260923_02_draw_rectangles.executor": "Run",
     "CMake 应用程序.cs101__dh_20260923_03.executor": "Run",
+    "CMake 应用程序.cs101__dh_20260923_04_lamps.executor": "Run",
+    "CMake 应用程序.cs101__dh_20260923_05_perfect_cubes.executor": "Run",
+    "CMake 应用程序.cs101__dh_20260923_11_fibonacci.executor": "Run",
+    "CMake 应用程序.cs101__sh_20260923_14_balloons.executor": "Run",
     "CMake 应用程序.dp__TJOI2007_walk_segments_dp.executor": "Run",
+    "CMake 应用程序.dsa__ch3_stack_queue__dsa_0301_sliding_window.executor": "Run",
+    "CMake 应用程序.dsa__ch3_stack_queue__dsa_0301_sliding_window_SLOW.executor": "Run",
+    "CMake 应用程序.dsa__ch3_stack_queue__dsa_0302_calculator.executor": "Run",
+    "CMake 应用程序.dsa__ch3_stack_queue__dsa_0306_stack_operation.executor": "Run",
     "CMake 应用程序.dsa__linear_list__dsa_0201_dictionary.executor": "Run",
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@@ -277,6 +303,7 @@
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     "ModuleVcsDetector.initialDetectionPerformed": "true",
     "Python.dh_20260909_11_count_digits_init.executor": "Run",
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     "Python.lc_127.executor": "Run",
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@@ -293,21 +320,24 @@
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     "deletionFromPopupRequiresConfirmation": "false",
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-    "last_opened_file_path": "/Users/roger/coding/exercises/_others/jzh",
+    "last_opened_file_path": "/Users/roger/coding/exercises/cs101",
     "node.js.detected.package.jshint": "true",
     "node.js.selected.package.jshint": "",
     "nodejs_package_manager_path": "npm",
     "org.rust.first.attach.projects": "true",
-    "settings.editor.selected.configurable": "fileTemplates"
+    "settings.editor.selected.configurable": "preferences.keymap"
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 }]]></component>
+  <component name="PyDebuggerOptionsProvider">
+    <option name="myDebuggerBackend" value="DEBUGPY" />
+  </component>
   <component name="RecentsManager">
     <key name="CopyFile.RECENT_KEYS">
-      <recent name="$PROJECT_DIR$/_others/jzh" />
       <recent name="$PROJECT_DIR$/cs101" />
+      <recent name="$PROJECT_DIR$/dsa/ch3_stack_queue" />
+      <recent name="$PROJECT_DIR$/_others/jzh" />
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       <recent name="$PROJECT_DIR$" />
-      <recent name="$PROJECT_DIR$/dp/backpack_dp" />
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     <key name="MoveFile.RECENT_KEYS">
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-  <component name="RunManager" selected="CMake 应用程序.cs101__dh_20260923_04_lamps">
+  <component name="RunManager" selected="Python.dh_04_04_balloons_init1">
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@@ -403,12 +428,92 @@
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+    <configuration name="cs101__dh_00_05_sum_fractions" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="exercises" TARGET_NAME="cs101__dh_00_05_sum_fractions" CONFIG_NAME="Debug-GCC" RUN_TARGET_PROJECT_NAME="exercises" RUN_TARGET_NAME="cs101__dh_00_05_sum_fractions">
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+    <configuration name="cs101__dh_00_10_smaller_numbers" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="exercises" TARGET_NAME="cs101__dh_00_10_smaller_numbers" CONFIG_NAME="Debug-GCC" RUN_TARGET_PROJECT_NAME="exercises" RUN_TARGET_NAME="cs101__dh_00_10_smaller_numbers">
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+        <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="cs101__dh_00_12_bottle_exchange" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="exercises" TARGET_NAME="cs101__dh_00_12_bottle_exchange" CONFIG_NAME="Debug-GCC" RUN_TARGET_PROJECT_NAME="exercises" RUN_TARGET_NAME="cs101__dh_00_12_bottle_exchange">
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+        <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
+      </method>
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+    <configuration name="cs101__dh_00_14_encryption" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="exercises" TARGET_NAME="cs101__dh_00_14_encryption" CONFIG_NAME="Debug-GCC" RUN_TARGET_PROJECT_NAME="exercises" RUN_TARGET_NAME="cs101__dh_00_14_encryption">
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+        <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
+      </method>
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+    <configuration name="cs101__dh_00_15_jusephus" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="exercises" TARGET_NAME="cs101__dh_00_15_jusephus" CONFIG_NAME="Debug-GCC" RUN_TARGET_PROJECT_NAME="exercises" RUN_TARGET_NAME="cs101__dh_00_15_jusephus">
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+    <configuration name="cs101__dh_00_16_swap_bits" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="exercises" TARGET_NAME="cs101__dh_00_16_swap_bits" CONFIG_NAME="Debug-GCC" RUN_TARGET_PROJECT_NAME="exercises" RUN_TARGET_NAME="cs101__dh_00_16_swap_bits">
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+    <configuration name="cs101__dh_03_05_perfect_cubes" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="exercises" TARGET_NAME="cs101__dh_03_05_perfect_cubes" CONFIG_NAME="Debug-GCC" RUN_TARGET_PROJECT_NAME="exercises" RUN_TARGET_NAME="cs101__dh_03_05_perfect_cubes">
+      <method v="2">
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-      <item itemvalue="CMake 应用程序.luogu_template_dsu_P3367" />
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       <item itemvalue="CMake 应用程序.NOIP2003J_bigint" />
       <item itemvalue="CMake 应用程序.NOIP2016J_bay" />
+      <item itemvalue="CMake 应用程序.SHOI2002_ski_WRONG" />
+      <item itemvalue="CMake 应用程序.SHOI2002_ski" />
+      <item itemvalue="CMake 应用程序._others__jzh__jzh_c1_h" />
+      <item itemvalue="CMake 应用程序._others__jzh__jzh_e2_j" />
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+      <item itemvalue="CMake 应用程序.cs101__dh_00_12_bottle_exchange" />
+      <item itemvalue="CMake 应用程序.cs101__dh_00_13_flip" />
+      <item itemvalue="CMake 应用程序.cs101__dh_00_14_encryption" />
+      <item itemvalue="CMake 应用程序.cs101__dh_00_15_jusephus" />
+      <item itemvalue="CMake 应用程序.cs101__dh_00_16_swap_bits" />
+      <item itemvalue="CMake 应用程序.cs101__dh_01_01" />
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+      <item itemvalue="CMake 应用程序.cs101__dh_01_03" />
+      <item itemvalue="CMake 应用程序.cs101__dh_01_04" />
+      <item itemvalue="CMake 应用程序.cs101__dh_01_05_vote" />
+      <item itemvalue="CMake 应用程序.cs101__dh_03_01_bike_or_walk" />
+      <item itemvalue="CMake 应用程序.cs101__dh_03_02_draw_rectangles" />
+      <item itemvalue="CMake 应用程序.cs101__dh_03_03" />
+      <item itemvalue="CMake 应用程序.cs101__dh_03_04_lamps" />
+      <item itemvalue="CMake 应用程序.cs101__dh_03_05_perfect_cubes" />
+      <item itemvalue="CMake 应用程序.cs101__dh_04_01_fibonacci" />
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+      <item itemvalue="CMake 应用程序.dp__SHOI2002_ski_dp" />
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+      <item itemvalue="CMake 应用程序.dsa__ch2_linear_list__dsa_0202_card_stacking" />
+      <item itemvalue="CMake 应用程序.dsa__ch2_linear_list__dsa_0203_string_insertion" />
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+      <item itemvalue="CMake 应用程序.dsa__ch3_stack_queue__dsa_0301_sliding_window" />
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+      <item itemvalue="CMake 应用程序.dsa__ch3_stack_queue__dsa_0306_stack_operation" />
+      <item itemvalue="CMake 应用程序.dp__backpack_dp__NOIP2005J_herbs_dp_knapsack_MWASTE_BETTER" />
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+      <item itemvalue="CMake 应用程序.dp__backpack_dp__NOIP2005J_herbs_dp_knapsack_PINGPONG" />
+      <item itemvalue="CMake 应用程序.dp__backpack_dp__NOIP2005J_herbs_dp_knapsack" />
+      <item itemvalue="CMake 应用程序.dp__backpack_dp__NOIP2006S_jinming_budget_dp_knapsack" />
+      <item itemvalue="CMake 应用程序.graph__ECNA2001_sort_letters" />
+      <item itemvalue="CMake 应用程序.graph__USACO06DECs_cow_picnic" />
+      <item itemvalue="CMake 应用程序.graph__luogu_P3916_graph_iteration_WRONG" />
+      <item itemvalue="CMake 应用程序.graph__luogu_P3916_graph_iteration" />
+      <item itemvalue="CMake 应用程序.lc_135_candy" />
+      <item itemvalue="CMake 应用程序.luogu_P1160_biodir_linked_list" />
+      <item itemvalue="CMake 应用程序.luogu_ez_B3628" />
+      <item itemvalue="CMake 应用程序.luogu_template_dsu_P3367" />
       <item itemvalue="CMake 应用程序.pojcs101_E01003" />
       <item itemvalue="CMake 应用程序.pojcs101_E01218" />
       <item itemvalue="CMake 应用程序.pojcs101_E02883" />
@@ -911,21 +1009,21 @@
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       <item itemvalue="CMake 应用程序.pojcs101_T27373_biggest_combination_t2_TLE" />
-      <item itemvalue="CMake 应用程序.SHOI2002_ski" />
-      <item itemvalue="CMake 应用程序.SHOI2002_ski_WRONG" />
+      <item itemvalue="CMake 应用程序.pojcs101_T27373_biggest_combination_t2" />
       <item itemvalue="CMake 应用程序.pojcs101_M02746_josephus_problem_simulation" />
-      <item itemvalue="Python.dh_20260909_11_count_digits_init" />
+      <item itemvalue="Python.dh_04_04_balloons_init1" />
       <item itemvalue="Python.NOI2001_food_chain_dsu" />
+      <item itemvalue="Python.dh_00_11_count_digits_init" />
       <item itemvalue="Python.pojcs101_M03247_palindromic_prime_init1" />
     </list>
     <recent_temporary>
       <list>
+        <item itemvalue="Python.dh_04_04_balloons_init1" />
         <item itemvalue="CMake 应用程序.pojcs101_M02746_josephus_problem_simulation" />
         <item itemvalue="Python.pojcs101_M03247_palindromic_prime_init1" />
         <item itemvalue="Python.NOI2001_food_chain_dsu" />
-        <item itemvalue="Python.dh_20260909_11_count_digits_init" />
+        <item itemvalue="Python.dh_00_11_count_digits_init" />
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@@ -939,7 +1037,7 @@
     },
     {
       "first": {
-        "##RUN_CONFIGURATION##": "CMake 应用程序.dsa__linear_list__dsa_0202_card_stacking",
+        "##RUN_CONFIGURATION##": "CMake 应用程序.dsa__ch3_stack_queue__dsa_0301_sliding_window",
         "cmake": "CMakeBuildProfile:Debug-GCC"
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
@@ -953,14 +1051,14 @@
     },
     {
       "first": {
-        "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260917_02_subway",
+        "##RUN_CONFIGURATION##": "CMake 应用程序.dsa__ch3_stack_queue__dsa_0301_sliding_window_SLOW",
         "cmake": "CMakeBuildProfile:Debug-GCC"
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
     },
     {
       "first": {
-        "##RUN_CONFIGURATION##": "CMake 应用程序.dsa__linear_list__dsa_0206_binary_query",
+        "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260917_02_subway",
         "cmake": "CMakeBuildProfile:Debug-GCC"
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
@@ -974,7 +1072,7 @@
     },
     {
       "first": {
-        "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260917_04",
+        "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260923_05_perfect_cubes",
         "cmake": "CMakeBuildProfile:Debug-GCC"
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
@@ -986,6 +1084,13 @@
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
     },
+    {
+      "first": {
+        "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260917_04",
+        "cmake": "CMakeBuildProfile:Debug-GCC"
+      },
+      "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
+    },
     {
       "first": {
         "##RUN_CONFIGURATION##": "CMake 应用程序.NOIP2016J_bay",
@@ -1002,7 +1107,7 @@
     },
     {
       "first": {
-        "##RUN_CONFIGURATION##": "CMake 应用程序.dsa__linear_list__dsa_0205_polynomial_addition",
+        "##RUN_CONFIGURATION##": "CMake 应用程序.dsa__ch3_stack_queue__dsa_0302_calculator",
         "cmake": "CMakeBuildProfile:Debug-GCC"
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
@@ -1042,27 +1147,6 @@
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
     },
-    {
-      "first": {
-        "##RUN_CONFIGURATION##": "CMake 应用程序.dsa__linear_list__dsa_0217_magic_square",
-        "cmake": "CMakeBuildProfile:Debug-GCC"
-      },
-      "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
-    },
-    {
-      "first": {
-        "##RUN_CONFIGURATION##": "CMake 应用程序._others__qyz__gdbh",
-        "cmake": "CMakeBuildProfile:Debug-GCC"
-      },
-      "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
-    },
-    {
-      "first": {
-        "##RUN_CONFIGURATION##": "CMake 应用程序.dsa__linear_list__dsa_0204_prefix_cycle",
-        "cmake": "CMakeBuildProfile:Debug-GCC"
-      },
-      "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
-    },
     {
       "first": {
         "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260923_02_draw_rectangles",
@@ -1070,6 +1154,13 @@
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
     },
+    {
+      "first": {
+        "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__sh_20260923_14_balloons",
+        "cmake": "CMakeBuildProfile:Debug-GCC"
+      },
+      "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
+    },
     {
       "first": {
         "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260909_12_bottle_exchange",
@@ -1079,14 +1170,14 @@
     },
     {
       "first": {
-        "##RUN_CONFIGURATION##": "CMake 应用程序.dsa__linear_list__dsa_0201_dictionary",
+        "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260917_03",
         "cmake": "CMakeBuildProfile:Debug-GCC"
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
     },
     {
       "first": {
-        "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260917_03",
+        "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260923_04_lamps",
         "cmake": "CMakeBuildProfile:Debug-GCC"
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
@@ -1112,6 +1203,13 @@
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
     },
+    {
+      "first": {
+        "##RUN_CONFIGURATION##": "CMake 应用程序.dsa__ch3_stack_queue__dsa_0306_stack_operation",
+        "cmake": "CMakeBuildProfile:Debug-GCC"
+      },
+      "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
+    },
     {
       "first": {
         "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260909_15_jusephus",
@@ -1140,6 +1238,19 @@
       },
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
     },
+    {
+      "first": {
+        "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260923_11_fibonacci",
+        "cmake": "CMakeBuildProfile:Debug-GCC"
+      },
+      "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
+    },
+    {
+      "first": {
+        "##RUN_CONFIGURATION##": "Python.dh_20260923_14_balloons_init1"
+      },
+      "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
+    },
     {
       "first": {
         "##RUN_CONFIGURATION##": "CMake 应用程序.cs101__dh_20260923_01_bike_or_walk",
@@ -1148,7 +1259,7 @@
       "second": "2c1c9069-eeff-46e4-9092-db62e2b1ded5"
     }
   ],
-  "modificationCount": 133
+  "modificationCount": 154
 }]]></component>
   <component name="SharedIndexes">
     <attachedChunks>
@@ -1186,7 +1297,8 @@
     <MESSAGE value="1" />
     <MESSAGE value="Update CMakeLists.txt" />
     <MESSAGE value="some programs" />
-    <option name="LAST_COMMIT_MESSAGE" value="some programs" />
+    <MESSAGE value="some programs!" />
+    <option name="LAST_COMMIT_MESSAGE" value="some programs!" />
   </component>
   <component name="XDebuggerManager">
     <breakpoint-manager>
@@ -1196,6 +1308,11 @@
           <line>75</line>
           <option name="timeStamp" value="6" />
         </line-breakpoint>
+        <line-breakpoint enabled="true" suspend="THREAD" type="python-line">
+          <url>file://$PROJECT_DIR$/cs101/dh_04_04_balloons_init1.py</url>
+          <line>9</line>
+          <option name="timeStamp" value="59" />
+        </line-breakpoint>
         <line-breakpoint enabled="true" type="com.jetbrains.cidr.execution.debugger.OCBreakpointType">
           <url>file://$PROJECT_DIR$/pojcs101_M03441_sum_zero.cpp</url>
           <line>32</line>
@@ -1217,22 +1334,47 @@
           <option name="timeStamp" value="36" />
         </line-breakpoint>
         <line-breakpoint enabled="true" type="com.jetbrains.cidr.execution.debugger.OCBreakpointType">
-          <url>file://$PROJECT_DIR$/dsa/linear_list/dsa_0202_card_stacking.cpp</url>
+          <url>file://$PROJECT_DIR$/dsa/ch2_linear_list/dsa_0202_card_stacking.cpp</url>
           <line>40</line>
           <option name="timeStamp" value="43" />
         </line-breakpoint>
         <line-breakpoint enabled="true" type="com.jetbrains.cidr.execution.debugger.OCBreakpointType">
-          <url>file://$PROJECT_DIR$/cs101/dh_20260917_01.cpp</url>
+          <url>file://$PROJECT_DIR$/cs101/dh_01_01.cpp</url>
           <line>5</line>
           <option name="timeStamp" value="44" />
         </line-breakpoint>
+        <line-breakpoint enabled="true" type="com.jetbrains.cidr.execution.debugger.OCBreakpointType">
+          <url>file://$PROJECT_DIR$/cs101/dh_03_05_perfect_cubes.cpp</url>
+          <line>43</line>
+          <option name="timeStamp" value="48" />
+        </line-breakpoint>
+        <line-breakpoint enabled="true" type="com.jetbrains.cidr.execution.debugger.OCBreakpointType">
+          <url>file://$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0301_sliding_window.cpp</url>
+          <line>69</line>
+          <option name="timeStamp" value="49" />
+        </line-breakpoint>
+        <line-breakpoint enabled="true" type="com.jetbrains.cidr.execution.debugger.OCBreakpointType">
+          <url>file://$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0306_stack_operation.cpp</url>
+          <line>24</line>
+          <option name="timeStamp" value="50" />
+        </line-breakpoint>
+        <line-breakpoint enabled="true" type="com.jetbrains.cidr.execution.debugger.OCBreakpointType">
+          <url>file://$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0302_calculator_WRONG.cpp</url>
+          <line>99</line>
+          <option name="timeStamp" value="56" />
+        </line-breakpoint>
+        <line-breakpoint enabled="true" type="com.jetbrains.cidr.execution.debugger.OCBreakpointType">
+          <url>file://$PROJECT_DIR$/dsa/ch3_stack_queue/dsa_0302_calculator.cpp</url>
+          <line>102</line>
+          <option name="timeStamp" value="57" />
+        </line-breakpoint>
+        <line-breakpoint enabled="true" type="com.jetbrains.cidr.execution.debugger.OCBreakpointType">
+          <url>file://$PROJECT_DIR$/cs101/sh_04_04_balloons.cpp</url>
+          <line>10</line>
+          <option name="timeStamp" value="61" />
+        </line-breakpoint>
       </breakpoints>
     </breakpoint-manager>
-    <watches-manager>
-      <configuration name="CMakeRunConfiguration">
-        <watch expression="grid" language="C++" />
-      </configuration>
-    </watches-manager>
   </component>
   <component name="XSLT-Support.FileAssociations.UIState">
     <expand />
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 588d036..af81406 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.10)
 project(exercises C CXX)
 
-set(CMAKE_C_STANDARD 11)
+set(CMAKE_C_STANDARD 17)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 
 set(CMAKE_CXX_STANDARD 17)
diff --git a/_others/others_test.c.cpp b/_others/others_test.c.cpp
new file mode 100644
index 0000000..972cab0
--- /dev/null
+++ b/_others/others_test.c.cpp
@@ -0,0 +1,50 @@
+#include <stdio.h>
+
+int main() {
+    long long T; //注意变量都要初始化 ,T为数组个数
+    scanf("%lld", &T); //数组个数，决定过程要执行多少次
+    for (int i = 0; i < T; i++) {
+        long long n, m, bianhao, yushu, max = -1, index; //注意变量都要初始化，n为包裹个数，m为箱子个数，result是余数，max是装的最多
+        //以上变量必须定义在循环里，因为一组过后所有数据要重新开始！要不然max，index值未清除！
+        scanf("%lld%lld", &n, &m); //键入包裹的个数和箱子的个数
+        long long Amount[m], number[n]; //Amount是定义对应的箱子里装几个 ，number是用数组记录包裹的“编号”
+        //禁止写错数组个数！
+        for (int j = 0; j < m; j++) //初始化箱子数组 ,注意数组是m个
+        {
+            Amount[j] = 0;
+        }
+        for (int k = 0; k < n; k++) //把包裹赋值，记录到number里 注意数组是n个
+        {
+            scanf("%lld", &bianhao);
+            number[k] = bianhao;
+        }
+        for (int s = 0; s < n; s++) //进行mol m运算，余数计入number里
+        {
+            yushu = number[s] % m;
+            Amount[yushu] = Amount[yushu] + 1;
+        }
+        for (int t = 0; t < m; t++) //此循环计算哪个箱子装的最多
+        {
+            //max=-1;错误  在循环里定义会导致max每走一个t都会被重置！
+            if (max < Amount[t]) {
+                max = Amount[t];
+            }
+        }
+        for (int u = 0; u < m; u++) //此循环寻找下标
+        {
+            if (Amount[u] == max) {
+                index = u;
+                break;
+            }
+        }
+        for (int v = 0; v < m; v++) //此循环输出amount数组里各个元素的大小
+        {
+            printf("%lld ", Amount[v]);
+        }
+        printf("\n");
+        printf("%lld %lld", index, max);
+        printf("\n");
+    }
+    return 0;
+}
+
diff --git a/_others/qyz/gdbh.cpp b/_others/qyz/gdbh.cpp
deleted file mode 100644
index b28f11b..0000000
--- a/_others/qyz/gdbh.cpp
+++ /dev/null
@@ -1,43 +0,0 @@
-#include <iostream>
-
-using namespace std;
-
-int primes[2001];
-
-bool is_prime(int a) {
-    for (int i = 2; i * i <= a; i++) {
-        if (a % i != 0) {
-            continue;
-        } else {
-            return false;
-        }
-    }
-    return true;
-}
-
-void init_primes() {
-    int current_num = 2, i = 0;
-    for (;; current_num++) {
-        if (is_prime(current_num)) {
-            primes[i] = current_num;
-            i++;
-        }
-    }
-}
-
-int main() {
-    ios::sync_with_stdio(false);
-    cin.tie(nullptr);
-    int a;
-    cin >> a;
-    if (a % 2 != 0 || a < 6) {
-        cout << "Error!" << endl;
-    } else
-        for (int i = 0; primes[i] <= a / 2; i++) {
-            if (is_prime(a - primes[i])) {
-                cout << a << "=" << i << "+" << a - i << endl;
-            }
-        }
-
-    return 0;
-}
diff --git a/_others/qyz/test.cpp b/_others/qyz/test.cpp
deleted file mode 100644
index 8d6ba74..0000000
--- a/_others/qyz/test.cpp
+++ /dev/null
@@ -1,18 +0,0 @@
-#include <iostream>
-
-using namespace std;
-
-
-// x[0]..x[99]
-
-bool is_prime(int n) {
-    for (int i=2; i*i<=n; i++) {
-        if (n%i == 0) {return false;}
-    }
-    return true;
-}
-
-int main() {
-    cout << is_prime(4);
-    return 0;
-}
\ No newline at end of file
diff --git a/cs101/dh_20260909_05_sum_fractions.cpp b/cs101/dh_00_05_sum_fractions.cpp
similarity index 100%
rename from cs101/dh_20260909_05_sum_fractions.cpp
rename to cs101/dh_00_05_sum_fractions.cpp
diff --git a/cs101/dh_20260909_10_smaller_numbers.cpp b/cs101/dh_00_10_smaller_numbers.cpp
similarity index 100%
rename from cs101/dh_20260909_10_smaller_numbers.cpp
rename to cs101/dh_00_10_smaller_numbers.cpp
diff --git a/cs101/dh_20260909_11_count_digits_init.py b/cs101/dh_00_11_count_digits_init.py
similarity index 100%
rename from cs101/dh_20260909_11_count_digits_init.py
rename to cs101/dh_00_11_count_digits_init.py
diff --git a/cs101/dh_20260909_12_bottle_exchange.cpp b/cs101/dh_00_12_bottle_exchange.cpp
similarity index 100%
rename from cs101/dh_20260909_12_bottle_exchange.cpp
rename to cs101/dh_00_12_bottle_exchange.cpp
diff --git a/cs101/dh_20260909_13_flip.cpp b/cs101/dh_00_13_flip.cpp
similarity index 100%
rename from cs101/dh_20260909_13_flip.cpp
rename to cs101/dh_00_13_flip.cpp
diff --git a/cs101/dh_20260909_14_encryption.cpp b/cs101/dh_00_14_encryption.cpp
similarity index 100%
rename from cs101/dh_20260909_14_encryption.cpp
rename to cs101/dh_00_14_encryption.cpp
diff --git a/cs101/dh_20260909_15_jusephus.cpp b/cs101/dh_00_15_jusephus.cpp
similarity index 100%
rename from cs101/dh_20260909_15_jusephus.cpp
rename to cs101/dh_00_15_jusephus.cpp
diff --git a/cs101/dh_20260909_16_swap_bits.cpp b/cs101/dh_00_16_swap_bits.cpp
similarity index 100%
rename from cs101/dh_20260909_16_swap_bits.cpp
rename to cs101/dh_00_16_swap_bits.cpp
diff --git a/cs101/dh_20260917_01.cpp b/cs101/dh_01_01.cpp
similarity index 100%
rename from cs101/dh_20260917_01.cpp
rename to cs101/dh_01_01.cpp
diff --git a/cs101/dh_20260917_02_subway.cpp b/cs101/dh_01_02_subway.cpp
similarity index 100%
rename from cs101/dh_20260917_02_subway.cpp
rename to cs101/dh_01_02_subway.cpp
diff --git a/cs101/dh_20260917_03.cpp b/cs101/dh_01_03.cpp
similarity index 100%
rename from cs101/dh_20260917_03.cpp
rename to cs101/dh_01_03.cpp
diff --git a/cs101/dh_20260917_04.cpp b/cs101/dh_01_04.cpp
similarity index 100%
rename from cs101/dh_20260917_04.cpp
rename to cs101/dh_01_04.cpp
diff --git a/cs101/dh_20260917_05_vote.cpp b/cs101/dh_01_05_vote.cpp
similarity index 100%
rename from cs101/dh_20260917_05_vote.cpp
rename to cs101/dh_01_05_vote.cpp
diff --git a/cs101/dh_20260923_01_bike_or_walk.cpp b/cs101/dh_03_01_bike_or_walk.cpp
similarity index 100%
rename from cs101/dh_20260923_01_bike_or_walk.cpp
rename to cs101/dh_03_01_bike_or_walk.cpp
diff --git a/cs101/dh_20260923_02_draw_rectangles.cpp b/cs101/dh_03_02_draw_rectangles.cpp
similarity index 100%
rename from cs101/dh_20260923_02_draw_rectangles.cpp
rename to cs101/dh_03_02_draw_rectangles.cpp
diff --git a/cs101/dh_20260923_03.cpp b/cs101/dh_03_03.cpp
similarity index 100%
rename from cs101/dh_20260923_03.cpp
rename to cs101/dh_03_03.cpp
diff --git a/cs101/dh_20260923_04_lamps.cpp b/cs101/dh_03_04_lamps.cpp
similarity index 100%
rename from cs101/dh_20260923_04_lamps.cpp
rename to cs101/dh_03_04_lamps.cpp
diff --git a/cs101/dh_03_05_perfect_cubes.cpp b/cs101/dh_03_05_perfect_cubes.cpp
new file mode 100644
index 0000000..4168a6d
--- /dev/null
+++ b/cs101/dh_03_05_perfect_cubes.cpp
@@ -0,0 +1,54 @@
+#include <algorithm>
+#include <iostream>
+#include <vector>
+#include <cmath>
+
+struct PerfectCubeNumber {
+    int num = 0;
+    std::tuple<int, int, int> children;
+
+    constexpr bool operator<(const PerfectCubeNumber& other) const {
+        return std::tie(num, children) < std::tie(other.num, other.children);
+    }
+};
+
+constexpr int MAX_N = 101;
+std::vector<PerfectCubeNumber> perfect_cube_numbers;
+int n;
+
+constexpr int cubes_sum(int a, int b, int c) {
+    return a * a * a + b * b * b + c * c * c;
+}
+
+void init_numbers() {
+    for (int a = 2; a < MAX_N; a++) {
+        for (int b = a; b < MAX_N; b++) {
+            for (int c = b; ; c++) {
+                const int x_cube = cubes_sum(a, b, c);
+                if (x_cube > MAX_N * MAX_N * MAX_N) { break; }
+                for (int x = std::floor(std::cbrt(x_cube)), i = 0; i < 3; x++, i++) {
+                    if (x * x * x == x_cube) {
+                        perfect_cube_numbers.push_back({x, std::tuple(a, b, c)});
+                    }
+                }
+            }
+        }
+    }
+    std::sort(perfect_cube_numbers.begin(), perfect_cube_numbers.end());
+}
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    init_numbers();
+
+    std::cin >> n;
+    for (const auto [num, children] : perfect_cube_numbers) {
+        if (num > n) { break; }
+        auto [a,b,c] = children;
+        std::cout << "Cube = " << num << ", Triple = (" << a << "," << b << "," << c << ")" << std::endl;
+    }
+
+    return 0;
+}
diff --git a/cs101/dh_04_01_fibonacci.cpp b/cs101/dh_04_01_fibonacci.cpp
new file mode 100644
index 0000000..6577c27
--- /dev/null
+++ b/cs101/dh_04_01_fibonacci.cpp
@@ -0,0 +1,31 @@
+#include <iostream>
+#include <array>
+
+constexpr int MAX_N = 21;
+
+// 编译期生成斐波那契数列
+constexpr std::array<int, MAX_N> make_fib() {
+    std::array<int, MAX_N> fib{}; // 零初始化
+    fib[0] = 1;
+    fib[1] = 1;
+    for (int i = 2; i < MAX_N; ++i) {
+        fib[i] = fib[i - 1] + fib[i - 2];
+    }
+    return fib;
+}
+
+static constexpr auto fib = make_fib();
+
+int x;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    std::cin >> x;
+    while (std::cin >> x) {
+        std::cout << fib[x - 1] << std::endl;
+    }
+
+    return 0;
+}
diff --git a/cs101/dh_04_04_balloons_init1.py b/cs101/dh_04_04_balloons_init1.py
new file mode 100644
index 0000000..b4000bf
--- /dev/null
+++ b/cs101/dh_04_04_balloons_init1.py
@@ -0,0 +1,17 @@
+def solve(n: int) -> int:
+    balloons = [i for i in range(1, n + 1)]
+    while True:
+        deleted_amount = 0
+        for x in range(1, n):
+            if len(balloons) <= x * x - deleted_amount - 1 or len(balloons) == 1:
+                break
+            del balloons[x * x - deleted_amount - 1]
+            deleted_amount += 1
+        if len(balloons) == 1:
+            break
+    return balloons[0]
+
+
+if __name__ == '__main__':
+    for n in range(1, 1150):
+        print(n, "->", solve(n))
diff --git a/cs101/sh_04_04_balloons.cpp b/cs101/sh_04_04_balloons.cpp
new file mode 100644
index 0000000..59d196e
--- /dev/null
+++ b/cs101/sh_04_04_balloons.cpp
@@ -0,0 +1,26 @@
+/*
+ * 本来想打表的，打着打着发现了一些数学规律。具体怎么证明嘛……🤷‍
+ */
+
+#include <iostream>
+#include <cmath>
+
+constexpr size_t MAX_N = 10001;
+
+int get_ans(int n) {
+    const int k = ceil(-0.5 + 0.5 * sqrt(4 * n + 1));
+    const bool extra = k * k < n;
+    const int ans = k * (k - 1) + 1 + k * extra;
+    return ans;
+}
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    int n;
+    std::cin >> n;
+    std::cout << get_ans(n) << std::endl;
+
+    return 0;
+}
diff --git a/dsa/linear_list/dsa_0201_dictionary.cpp b/dsa/ch2_linear_list/dsa_0201_dictionary.cpp
similarity index 100%
rename from dsa/linear_list/dsa_0201_dictionary.cpp
rename to dsa/ch2_linear_list/dsa_0201_dictionary.cpp
diff --git a/dsa/linear_list/dsa_0202_card_stacking.cpp b/dsa/ch2_linear_list/dsa_0202_card_stacking.cpp
similarity index 100%
rename from dsa/linear_list/dsa_0202_card_stacking.cpp
rename to dsa/ch2_linear_list/dsa_0202_card_stacking.cpp
diff --git a/dsa/linear_list/dsa_0203_string_insertion.cpp b/dsa/ch2_linear_list/dsa_0203_string_insertion.cpp
similarity index 100%
rename from dsa/linear_list/dsa_0203_string_insertion.cpp
rename to dsa/ch2_linear_list/dsa_0203_string_insertion.cpp
diff --git a/dsa/linear_list/dsa_0204_prefix_cycle.cpp b/dsa/ch2_linear_list/dsa_0204_prefix_cycle.cpp
similarity index 100%
rename from dsa/linear_list/dsa_0204_prefix_cycle.cpp
rename to dsa/ch2_linear_list/dsa_0204_prefix_cycle.cpp
diff --git a/dsa/linear_list/dsa_0205_polynomial_addition.cpp b/dsa/ch2_linear_list/dsa_0205_polynomial_addition.cpp
similarity index 100%
rename from dsa/linear_list/dsa_0205_polynomial_addition.cpp
rename to dsa/ch2_linear_list/dsa_0205_polynomial_addition.cpp
diff --git a/dsa/linear_list/dsa_0206_binary_query.cpp b/dsa/ch2_linear_list/dsa_0206_binary_query.cpp
similarity index 100%
rename from dsa/linear_list/dsa_0206_binary_query.cpp
rename to dsa/ch2_linear_list/dsa_0206_binary_query.cpp
diff --git a/dsa/linear_list/dsa_0217_magic_square.cpp b/dsa/ch2_linear_list/dsa_0217_magic_square.cpp
similarity index 100%
rename from dsa/linear_list/dsa_0217_magic_square.cpp
rename to dsa/ch2_linear_list/dsa_0217_magic_square.cpp
diff --git a/dsa/ch3_stack_queue/dsa_0301_sliding_window.cpp b/dsa/ch3_stack_queue/dsa_0301_sliding_window.cpp
new file mode 100644
index 0000000..aa3b934
--- /dev/null
+++ b/dsa/ch3_stack_queue/dsa_0301_sliding_window.cpp
@@ -0,0 +1,111 @@
+#include <algorithm>
+#include <iostream>
+#include <queue>
+
+constexpr size_t MAX_N = 1e6 + 1;
+constexpr unsigned long long SOLVE_1_THRESHOLD = 0;
+
+template <typename T>
+class QueueWithMinMax {
+protected:
+    std::deque<T> max_queue, min_queue;
+    // std::priority_queue<T, std::vector<T>, std::greater<>> min_queue;
+
+public:
+    std::queue<T> q;
+
+    void push(const T& x) {
+        q.push(x);
+        while (!max_queue.empty() && max_queue.back() < x) {
+            max_queue.pop_back();
+        }
+        max_queue.push_back(x);
+        while (!min_queue.empty() && min_queue.back() > x) {
+            min_queue.pop_back();
+        }
+        min_queue.push_back(x);
+    }
+
+    void pop() {
+        if (!max_queue.empty() && q.front() >= max_queue.front()) {
+            max_queue.pop_front();
+        }
+        if (!min_queue.empty() && q.front() <= min_queue.front()) {
+            min_queue.pop_front();
+        }
+        q.pop();
+    }
+
+    [[nodiscard]] T front() const { return q.front(); }
+
+    [[nodiscard]] T get_max() const {
+        return max_queue.front();
+    }
+
+    [[nodiscard]] T get_min() const {
+        return min_queue.front();
+    }
+};
+
+int n, window_length;
+int nums[MAX_N], max_nums[MAX_N], min_nums[MAX_N];
+QueueWithMinMax<int> queue;
+
+
+void solve_1() {
+    for (int i = 0; i + window_length <= n; i++) {
+        max_nums[i] = *std::max_element(nums + i, nums + i + window_length);
+        min_nums[i] = *std::min_element(nums + i, nums + i + window_length);
+    }
+}
+
+void solve_2() {
+    for (int i = 0; i < window_length; i++) {
+        queue.push(nums[i]);
+    }
+
+    for (int i = 0; i + window_length < n; i++) {
+        max_nums[i] = queue.get_max();
+        min_nums[i] = queue.get_min();
+        queue.pop();
+        queue.push(nums[i + window_length]);
+    }
+    max_nums[n - window_length] = queue.get_max();
+    min_nums[n - window_length] = queue.get_min();
+}
+
+void print_ans() {
+    for (int i = 0; i <= n - window_length; i++) {
+        std::cout << min_nums[i] << " ";
+    }
+    std::cout << std::endl;
+    for (int i = 0; i <= n - window_length; i++) {
+        std::cout << max_nums[i] << " ";
+    }
+    std::cout << std::endl;
+}
+
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    std::cin >> n >> window_length;
+    if (window_length > n) { window_length = n; }
+    for (int i = 0; i < n; i++) {
+        std::cin >> nums[i];
+    }
+
+    if (1ll * n * window_length < SOLVE_1_THRESHOLD) {
+        solve_1();
+    } else {
+        solve_2();
+    }
+
+    // solve_1();
+    // print_ans();
+    // solve_2();
+    print_ans();
+
+    return 0;
+}
diff --git a/dsa/ch3_stack_queue/dsa_0301_sliding_window_SLOW.cpp b/dsa/ch3_stack_queue/dsa_0301_sliding_window_SLOW.cpp
new file mode 100644
index 0000000..65aff0b
--- /dev/null
+++ b/dsa/ch3_stack_queue/dsa_0301_sliding_window_SLOW.cpp
@@ -0,0 +1,38 @@
+#include <algorithm>
+#include <iostream>
+#include <queue>
+
+constexpr size_t MAX_N = 1e6 + 1;
+
+
+int n, window_length;
+int nums[MAX_N], max_nums[MAX_N], min_nums[MAX_N];
+
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    std::cin >> n >> window_length;
+    if (window_length > n) { window_length = n; }
+    for (int i = 0; i < n; i++) {
+        std::cin >> nums[i];
+    }
+
+    for (int i = 0; i + window_length <= n; i++) {
+        max_nums[i] = *std::max_element(nums + i, nums + i + window_length);
+        min_nums[i] = *std::min_element(nums + i, nums + i + window_length);
+    }
+
+    for (int i = 0; i <= n - window_length; i++) {
+        std::cout << min_nums[i] << " ";
+    }
+    std::cout << std::endl;
+    for (int i = 0; i <= n - window_length; i++) {
+        std::cout << max_nums[i] << " ";
+    }
+    std::cout << std::endl;
+
+
+    return 0;
+}
diff --git a/dsa/ch3_stack_queue/dsa_0302_calculator.cpp b/dsa/ch3_stack_queue/dsa_0302_calculator.cpp
new file mode 100644
index 0000000..f0332b2
--- /dev/null
+++ b/dsa/ch3_stack_queue/dsa_0302_calculator.cpp
@@ -0,0 +1,165 @@
+#include <iostream>
+#include <stack>
+#include <vector>
+#include <variant>
+#include <cassert>
+
+class Token {
+protected:
+    std::variant<char, int> token_variant_;
+
+public:
+    explicit Token(char c) : token_variant_(c) {}
+    explicit Token(int x) : token_variant_(x) {}
+
+    [[nodiscard]] bool is_operator() const {
+        return std::holds_alternative<char>(token_variant_);
+    }
+
+    [[nodiscard]] char get_operator() const {
+        if (!is_operator()) { throw std::invalid_argument("Not an operator"); }
+        return std::get<char>(token_variant_);
+    }
+
+    [[nodiscard]] int get_number() const {
+        if (is_operator()) { throw std::invalid_argument("Is an operator"); }
+        return std::get<int>(token_variant_);
+    }
+
+    [[nodiscard]] int get_priority() const {
+        if (get_operator() == '+' || get_operator() == '-') { return 1; }
+        if (get_operator() == '*' || get_operator() == '/') { return 2; }
+        throw std::invalid_argument("Unknown priority");
+    }
+
+    template <typename T1, typename T2>
+    [[nodiscard]] auto calc_operator(T1 a, T2 b) const {
+        switch (get_operator()) {
+        case '+': return a + b;
+        case '-': return a - b;
+        case '*': return a * b;
+        case '/': return a / b;
+        default: throw std::invalid_argument("Uncalculatable operator");
+        }
+    }
+
+    bool operator==(char c) const {
+        if (!is_operator()) { return false; }
+        return get_operator() == c;
+    }
+
+    bool operator==(int x) const {
+        if (is_operator()) { return false; }
+        return get_number() == x;
+    }
+
+    template <typename T>
+    bool operator!=(T x) {
+        return !(*this == x);
+    }
+
+    friend std::ostream& operator<<(std::ostream& os, Token token) {
+        if (token.is_operator()) {
+            os << token.get_operator();
+        } else {
+            os << '[' << token.get_number() << ']';
+        }
+        return os;
+    }
+};
+
+using Expression = std::vector<Token>;
+
+std::ostream& operator<<(std::ostream& os, const Expression& expression) {
+    for (const auto& token : expression) {
+        os << token;
+    }
+    return os;
+}
+
+Expression parse_string(const std::string& str) {
+    Expression expression;
+    std::string temp_token;
+    for (char c : str) {
+        if (!(c >= '0' && c <= '9')) {
+            if (!temp_token.empty()) {
+                expression.emplace_back(std::stoi(temp_token));
+                temp_token.clear();
+            }
+            expression.emplace_back(c);
+        } else {
+            temp_token += c;
+        }
+    }
+    if (!temp_token.empty()) { expression.emplace_back(std::stoi(temp_token)); }
+    return expression;
+}
+
+Expression convert_to_postfix(const Expression& infix_expression) {
+    Expression postfix_expression;
+    std::stack<Token> operators;
+
+    for (const auto& token : infix_expression) {
+        if (!token.is_operator()) {
+            postfix_expression.push_back(token);
+            continue;
+        }
+        if (token.get_operator() == '(') {
+            operators.push(token);
+            continue;
+        }
+        if (token.get_operator() == ')') {
+            while (operators.top().get_operator() != '(') {
+                postfix_expression.push_back(operators.top());
+                operators.pop();
+            }
+            operators.pop();
+            continue;
+        }
+        while (!operators.empty() && operators.top() != '('
+            && token.get_priority() <= operators.top().get_priority()) {
+            postfix_expression.push_back(operators.top());
+            operators.pop();
+        }
+        operators.push(token);
+    }
+    while (!operators.empty()) {
+        postfix_expression.push_back(operators.top());
+        operators.pop();
+    }
+    return postfix_expression;
+}
+
+int calculate_postfix(const Expression& postfix_expression) {
+    std::stack<int> numbers;
+    for (const auto& token : postfix_expression) {
+        if (!token.is_operator()) {
+            numbers.push(token.get_number());
+            continue;
+        }
+        int b = numbers.top();
+        numbers.pop();
+        int a = numbers.top();
+        numbers.pop();
+        numbers.push(token.calc_operator(a, b));
+    }
+    assert(numbers.size() == 1);
+    return numbers.top();
+}
+
+std::string s;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    std::cin >> s;
+    while (std::cin >> s) {
+        Expression infix_expression = parse_string(s);
+        std::clog << infix_expression << std::endl;
+        Expression postfix_expression = convert_to_postfix(infix_expression);
+        std::cout << calculate_postfix(postfix_expression) << std::endl;
+    }
+
+    return 0;
+}
diff --git a/dsa/ch3_stack_queue/dsa_0302_calculator_WRONG.cpp b/dsa/ch3_stack_queue/dsa_0302_calculator_WRONG.cpp
new file mode 100644
index 0000000..e0b8956
--- /dev/null
+++ b/dsa/ch3_stack_queue/dsa_0302_calculator_WRONG.cpp
@@ -0,0 +1,137 @@
+#include <cassert>
+#include <iostream>
+#include <sstream>
+#include <variant>
+#include <vector>
+#include <optional>
+#include <stack>
+
+
+struct Token {
+    std::variant<char, int> token;
+
+    explicit Token(char c) : token(c) {}
+    explicit Token(int x) : token(x) {}
+
+    [[nodiscard]] bool is_operator() const {
+        return std::holds_alternative<char>(token);
+    }
+
+    [[nodiscard]] char get_operator() const {
+        if (!is_operator()) { throw std::invalid_argument("Not an operator"); }
+        return std::get<char>(token);
+    }
+
+    [[nodiscard]] int get_number() const {
+        if (is_operator()) { throw std::invalid_argument("Is an operator"); }
+        return std::get<int>(token);
+    }
+
+    bool operator==(char c) const {
+        if (!is_operator()) { return false; }
+        return get_operator() == c;
+    }
+
+    bool operator==(int x) const {
+        if (is_operator()) { return false; }
+        return get_number() == x;
+    }
+
+    template <typename T>
+    bool operator!=(T x) {
+        return !(*this == x);
+    }
+};
+
+using Expression = std::vector<Token>;
+
+Expression parse_string(const std::string& str) {
+    Expression expression;
+    std::string temp_token;
+    for (char c : str) {
+        if (!(c > '0' && c < '9')) {
+            if (!temp_token.empty()) {
+                expression.emplace_back(std::stoi(temp_token));
+                temp_token.clear();
+            }
+            expression.emplace_back(c);
+        } else {
+            temp_token += c;
+        }
+    }
+    if (!temp_token.empty()) { expression.emplace_back(std::stoi(temp_token)); }
+    return expression;
+}
+
+void calculate_chunk(std::stack<Token>& undealt_tokens, std::stack<Token>& ready_tokens) {
+    while (!undealt_tokens.empty() && undealt_tokens.top() != '(') {
+        ready_tokens.push(undealt_tokens.top());
+        undealt_tokens.pop();
+    }
+    int temp_result = ready_tokens.top().get_number();
+    ready_tokens.pop();
+    while (!ready_tokens.empty()) {
+        char op = ready_tokens.top().get_operator();
+        ready_tokens.pop();
+        if (op == '+') {
+            temp_result += ready_tokens.top().get_number();
+        } else if (op == '-') {
+            temp_result -= ready_tokens.top().get_number();
+        } else {
+            throw std::logic_error("Unexpected operator token in chunk.");
+        }
+        ready_tokens.pop();
+    }
+    if (!undealt_tokens.empty()) {
+        undealt_tokens.pop();
+    }
+    undealt_tokens.emplace(temp_result);
+}
+
+int calculate(const Expression& expression) {
+    // 策略：
+    // 遇到 * / 直接算（本质上是把上一个子 expression 倒栈）
+    // 遇到右括号 / 结尾开始倒栈
+    // 对于倒栈，只剩下 +- 需要处理。
+    std::stack<Token> undealt_tokens, ready_tokens;
+    std::optional<Token> temp_token;
+
+    for (const auto& token : expression) {
+        if (token == '*' || token == '/') {
+            temp_token = token;
+            continue;
+        }
+        if (temp_token.has_value()) {
+            int a = undealt_tokens.top().get_number();
+            undealt_tokens.pop();
+            undealt_tokens.emplace(
+                temp_token == '*' ? a * token.get_number() : a / token.get_number()
+            );
+            temp_token.reset();
+            continue;
+        }
+        if (token == ')') {
+            calculate_chunk(undealt_tokens, ready_tokens);
+            continue;
+        }
+        undealt_tokens.push(token);
+    }
+    calculate_chunk(undealt_tokens, ready_tokens);
+    assert(undealt_tokens.size() == 1);
+    return undealt_tokens.top().get_number();
+}
+
+int n;
+std::string s;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+    std::cin >> n;
+    for (int _ = 0; _ < n; _++) {
+        std::cin >> s;
+        std::cout << calculate(parse_string(s)) << std::endl;
+    }
+
+    return 0;
+}
diff --git a/dsa/ch3_stack_queue/dsa_0306_stack_operation.cpp b/dsa/ch3_stack_queue/dsa_0306_stack_operation.cpp
new file mode 100644
index 0000000..42dea05
--- /dev/null
+++ b/dsa/ch3_stack_queue/dsa_0306_stack_operation.cpp
@@ -0,0 +1,46 @@
+#include <iostream>
+#include <stack>
+#include <vector>
+
+using Operation = std::pair<bool, int>;
+
+int n, idx = 0;
+std::stack<int> stack;
+std::vector<int> sequence;
+std::vector<Operation> operation_log;
+
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    std::cin >> n;
+    operation_log.reserve(2 * n);
+    sequence.resize(n);
+    for (int i = 0; i < n; i++) {
+        std::cin >> sequence[i];
+    }
+
+    for (int current_num = 1; current_num <= n;) {
+        while ((stack.empty() || stack.top() != sequence[idx]) && current_num <= n) {
+            stack.push(current_num);
+            operation_log.emplace_back(false, current_num);
+            current_num++;
+        }
+        while (!stack.empty() && stack.top() == sequence[idx]) {
+            stack.pop();
+            operation_log.emplace_back(true, sequence[idx]);
+            idx++;
+        }
+    }
+    if (!stack.empty()) {
+        std::cout << "NO" << std::endl;
+    } else {
+        for (const auto [op, x] : operation_log) {
+            std::cout << (op ? "POP " : "PUSH ") << x << std::endl;
+        }
+    }
+
+
+    return 0;
+}