Submission #1004984

#	Time	Username	Problem	Language	Result	Execution time	Memory
1004984		vjudge1	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	5064 ms	524288 KiB

street_lamps

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

const int N = 3e5 + 10;
int n, q;
string s;

int main(){
    cin >> n >> q >> s;
    vector<string> vec;
    vec.push_back(s);
    for (int i = 0; i < q; i ++){
        string qx;
        cin >> qx;

        if (qx[0] == 't'){
            int x;
            cin >> x;
            x--;
            s[x] = '1' - s[x] + '0';
        }
        else{
            int a, b;
            cin >> a >> b;
            a--, b--;

            int ans = 0;
            for (string x : vec){
                bool good = 1;
                for (int i = a; i < b; i ++)
                    if (x[i] == '0')
                        good = 0;
                ans += good;
            }

            cout << ans << endl;
        }
        vec.push_back(s);    
    }
}

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