Submission #902440

#	Time	Username	Problem	Language	Result	Execution time	Memory
902440		Trisanu_Das	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	83 ms	12016 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