Submission #1269722

#	Time	Username	Problem	Language	Result	Execution time	Memory
1269722		yanb	Election (BOI18_election)	C++20	28 / 100	3095 ms	1408 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;

    vector<int> pref(n + 1);
    for (int i = 0; i < n; i++) {
        pref[i + 1] = pref[i] + (s[i] == 'C' ? 1 : -1);
    }

    while (q--) {
        int l, r;
        cin >> l >> r;
        l--; r--;
        int ans = 0, cur = 0;
        for (int i = l; i <= r; i++) {
            cur = max(0ll, cur + (s[i] == 'C' ? 1 : -1));
            ans = max(ans, cur);
        }
        cout << ans - pref[r + 1] + pref[l] << "\n";
    }
}

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