Submission #163963

#	Time	Username	Problem	Language	Result	Execution time	Memory
163963		Leonardo_Paes	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	3 ms	376 KiB

street_lamps

#include <bits/stdc++.h>

using namespace std;

const int maxn = 1e5+10;

int n, q;

string initial;

vector<int> toggles;

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

    cin >> n >> q;

    initial.resize(n+2);

    for(int i=1; i<=n; i++){
        cin >> initial[i];
    }

    toggles.push_back(0);

    if(n<=100 and q<=100){
        for(int t=1; t<=q; t++){
            string op;

            cin >> op;

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

                cin >> a >> b;

                string now = initial;

                int ans = 0;

                for(int i=0; i<toggles.size(); i++){
                    if(now[toggles[i]]=='0') now[toggles[i]] = '1';
                    else now[toggles[i]] = '0';

                    bool ok = true;

                    for(int j=a; j<b; j++){
                        if(now[j] == '0') ok = false;
                        //cout << now[j] << " ";
                    }
                    //cout << endl;

                    if(ok) ans++;
                }

                cout << ans << endl;

                toggles.push_back(0);
            }
            else{
                int i;

                cin >> i;

                toggles.push_back(i);
            }
        }
    }

    return 0;
}

Compilation message (stderr)

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:41:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 for(int i=0; i<toggles.size(); i++){
                              ~^~~~~~~~~~~~~~~

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