Submission #1311586

#	Time	Username	Problem	Language	Result	Execution time	Memory
1311586		dm2010	Election (BOI18_election)	C++20	28 / 100	3094 ms	732 KiB

election

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int N;
    cin >> N;
    string S;
    cin >> S;

    int Q;
    cin >> Q;

    while (Q--) {
        int L, R;
        cin >> L >> R;
        L--; R--;

        vector<bool> removed(R - L + 1, false);


        int bal = 0;
        for (int i = 0; i <= R - L; i++) {
            if (removed[i]) continue;
            if (S[L + i] == 'C') bal++;
            else bal--;

            if (bal < 0) {
                removed[i] = true;
                bal++;
            }
        }


        bal = 0;
        for (int i = R - L; i >= 0; i--) {
            if (removed[i]) continue;
            if (S[L + i] == 'C') bal++;
            else bal--;

            if (bal < 0) {
                removed[i] = true;
                bal++;
            }
        }

        int ans = 0;
        for (bool x : removed) ans += x;
        cout << ans << "\n";
    }
}

• Subtask 1: 28 / 28
• Subtask 2: 0 / 54
• Subtask 3: 0 / 18