Submission #163952

#	Time	Username	Problem	Language	Result	Execution time	Memory
163952		Leonardo_Paes	가로등 (APIO19_street_lamps)	C++17	0 / 100	465 ms	4256 KiB

street_lamps

#include <bits/stdc++.h>

using namespace std;

const int maxn = 1e5+10;

typedef pair<int, bool> pii;

int n, q;

pii last[maxn];

int main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);

    cin >> n >> q;

    for(int i=1; i<=n; i++){
        char a;

        cin >> a;

        last[i] = {0, bool(a-'0')};
    }


    for(int t=1; t<=q; t++){
        string op;

        cin >> op;

        if(op[0] == 'q'){
            int a, b;

            cin >> a >> b;

            bool ok = true;

            int ans = 0;

            for(int i=a; i<b; i++){
                if(!last[i].second) ok = false;
                ans = max(ans, last[i].first);
            }

            if(!ok) cout << 0 << endl;
            else cout << t-ans << endl;
        }
        else{
            int i;

            cin >> i;

            last[i].first = t, last[i].second ^= 1;
        }
    }

    return 0;
}

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