Submission #736454

#	Time	Username	Problem	Language	Result	Execution time	Memory
736454		Dan4Life	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	133 ms	10944 KiB

street_lamps

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

const int maxn = (int)3e5+10;

string s;
int n, q, a[maxn], cnt[maxn], t[maxn];
int32_t main() {
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> n >> q >> s;
	for(int i = 1; i <= n; i++){
		a[i] = (s[i-1]=='1');
		t[i] = (a[i]==1?0:-1);
	}
	for(int i = 1; i <= q; i++){
		int x, y; cin >> s >> x;

		if(s[0]=='t'){
			a[x]^=1;
			if(a[x]) t[x]=i;
			else cnt[x]+=i-t[x];
		}
		else cin >> y, cout << cnt[x]+a[x]*(i-t[x]) << "\n";
	}
}

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