Submission #403174

#	Time	Username	Problem	Language	Result	Execution time	Memory
403174		AmineTrabelsi	Street Lamps (APIO19_street_lamps)	C++14	20 / 100	808 ms	11100 KiB

street_lamps

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

int main(){
    //ios::sync_with_stdio(0);cin.tie(0);
    int n,q;
    cin>>n>>q;
    string s;
    cin>>s;
    vector<int> cnt,last_on(n+1,0);
    for(auto i:s)cnt.push_back(i-'0');
    vector<bool> on(cnt.begin(),cnt.end());
    for(int i=0;i<n;i++){
        if(on[i]){
            last_on[i] = 0;
        }else last_on[i] = 1e9+7;
    }
    for(int time=1;time<=q;time++){
        string t;
        cin>>t;
        if(t == "toggle"){
            int ind;
            cin>>ind;
            ind--;
            if(!on[ind]){
                on[ind] = 1;
                last_on[ind] = time;
                cnt[ind]++;
            }else{
                int pre = time-last_on[ind]-1;
                cnt[ind] += (pre >= 0 ? pre : 0);
                last_on[ind] = 1e9+7;
                on[ind] = 0;
            }
        }else{
            int a,b;
            cin>>a>>b;
            int pre = time-last_on[a-1]-1;
            cout << cnt[a-1]+(pre >= 0 ? pre : 0) << '\n';
        }
    }
    return 0;
}

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