some programs!!

cs101/dh_00_12_bottle_exchange.cpp

@@ -0,0 +1,23 @@
+#include <iostream>
+
+using namespace std;
+
+long long exchange_requirement, empty_bottles_amount, filled_bottles_amount, ans;
+
+int main() {
+    ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    cin >> exchange_requirement >> filled_bottles_amount;
+
+    while (true) {
+        ans += filled_bottles_amount;
+        empty_bottles_amount += filled_bottles_amount;
+        filled_bottles_amount = empty_bottles_amount / exchange_requirement;
+        empty_bottles_amount %= exchange_requirement;
+        if (filled_bottles_amount == 0) { break; }
+    }
+    cout << ans << endl;
+
+    return 0;
+}