Update CMakeLists.txt

pojcs101_T27104_chicken_monitors.cpp

@@ -0,0 +1,62 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+
+using namespace std;
+
+using Range = pair<int, int>;
+
+void log_range_vector(const vector<Range>& ranges, const string& prefix = "") {
+    clog << prefix;
+    for (const Range& r : ranges) {
+        clog << "(" << r.first << "," << r.second << ")" << " ";
+    }
+    clog << endl;
+}
+
+size_t get_min_ranges_amount(vector<Range> ranges, Range full_range) {
+    sort(ranges.begin(), ranges.end());
+    log_range_vector(ranges, "ranges: ");
+    size_t i = 0, ans = 0;
+    while (ranges[i].second < full_range.first) { i++; }
+    int max_start = 0, current_end = ranges[i].second;
+    while (true) {
+        while (ranges[i].first <= max_start) {
+            current_end = max(current_end, ranges[i].second);
+            if (current_end >= full_range.second) { return ans + 1; }
+            i++;
+            if (i >= ranges.size()) { throw invalid_argument("No valid ranges found (inside loop)"); }
+        }
+        ans++;
+        if (current_end >= full_range.second) { return ans; }
+        max_start = current_end;
+    }
+    throw invalid_argument("No valid ranges found (outside loop)");
+}
+
+vector<Range> get_ranges(const vector<int>& monitors) {
+    vector<Range> ranges;
+    for (int i = 0; i < monitors.size(); i++) {
+        ranges.emplace_back(i - monitors[i], i + monitors[i] + 1);
+    }
+    return ranges;
+}
+
+int main() {
+    ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    size_t monitors_amount;
+    cin >> monitors_amount;
+    vector<int> monitors(monitors_amount);
+    for (int i = 0; i < monitors_amount; i++) {
+        cin >> monitors[i];
+    }
+    vector<Range> ranges = get_ranges(monitors);
+    Range full_range = {0, monitors_amount};
+
+    cout << get_min_ranges_amount(ranges, full_range) << endl;
+
+
+    return 0;
+}