Submission #1031735

#	Time	Username	Problem	Language	Result	Execution time	Memory
1031735		stdfloat	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	5030 ms	524288 KiB

street_lamps

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

using ll = long long;

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

    int n, q;
    string s;
    cin >> n >> q >> s;

    vector<string> v = {s};
    while (q--) {
        string t;
        cin >> t;

        if (t == "toggle") {
            int i;
            cin >> i; i--;

            s[i] = '0' + (s[i] == '0');
        }
        else {
            int a, b;
            cin >> a >> b; a--; b--;

            int cnt = 0;
            for (auto i : v) cnt += !count(i.begin() + a, i.begin() + b, '0');

            cout << cnt << '\n';
        }

        v.push_back(s);
    }
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20