Submission #1269716

#	Time	Username	Problem	Language	Result	Execution time	Memory
1269716		yanb	Election (BOI18_election)	C++20	0 / 100	8 ms	320 KiB

election

#include <bits/stdc++.h>

using namespace std;

#define int long long
using pii = pair<int, int>;
using t3i = tuple<int, int, int>;

signed main() {
    int n;
    cin >> n;
    string s;
    cin >> s;
    int q;
    cin >> q;
    while (q--) {
        int l, r;
        cin >> l >> r;
        l--; r--;
        vector<int> ball(r - l + 2), balr(r - l + 2);
        for (int i = l; i <= r; i++) {
            ball[i - l + 1] = ball[i - l] + (s[i] == 'C' ? 1 : -1);
        }
        for (int i = r; i >= l; i--) {
            balr[i - l] = balr[i - l + 1] + (s[i] == 'C' ? 1 : -1);
        }
        int ans = 0;
        for (int i = 0; i < r - l + 2; i++) {
            ans = min(ans, min(0ll, ball[i]) + min(0ll, balr[i]));
        }
        cout << -ans << "\n";
    }
}

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