Submission #655090

#	Time	Username	Problem	Language	Result	Execution time	Memory
655090		DeMen100ns	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	429 ms	8880 KiB

street_lamps

/*
Author : DeMen100ns (a.k.a Vo Khac Trieu)
School : VNU-HCM High school for the Gifted
fuck you adhoc
*/

#include <bits/stdc++.h>

using namespace std;

const int N = 3e5 + 5;
const long long INF = 1e18 + 7;
const int MAXA = 1e9;
const int B = sqrt(N) + 5;

int n, q;
string s;

int last[N];
int sum[N];

inline void subtask2(){
    s = " " + s;

    for(int i = 1; i <= q; ++i){
        string type; cin >> type;
        if (type == "query"){
            int l, r; cin >> l >> r;

            int ans = sum[l];
            if (s[l] == '1'){
                ans += (i - last[l]);
            }
            cout << ans << endl;
        } else {
            int p; cin >> p;

            if (s[p] == '1'){
                sum[p] += (i - last[p]);
            }

            last[p] = i;
            s[p] ^= 1;
        }
    }
}

void solve()
{
    cin >> n >> q;
    cin >> s;
    
    subtask2();
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    // freopen("codeforces.inp","r",stdin);
    // freopen("codeforces.out","w",stdout);

    int t = 1; // cin >> t;
    while (t--)
    {
        solve();
    }
}

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