# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
249067 | crossing0ver | Street Lamps (APIO19_street_lamps) | C++17 | 1 ms | 512 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
#define pb push_back
#define ll long long
using namespace std;
const int N = 3e5+5;
int n,q;
string S;
bool s[N];
void Small() {
string type;
vector<int> Q;
Q.pb(-1);
for (int rep = 0,a,b,x; rep < q; rep++) {
cin >> type;
if (type[0] == 't') {
cin >> x;
x--;
Q.pb(x);
}
else {
cin >> a >> b;
a--; b-=2;
int ans = 0;
for (int i : Q) {
if (i != -1 ) s[i] = (!s[i]);
bool flag = 1;
for (int i = a; i <= b; i++) if (s[i] == 0) flag = 0;
if (flag) ans++;
}
for (int i : Q) if (i != -1) s[i] = (!s[i]);
cout << ans <<'\n';
Q.pb(-1);
}
}
}
main() {
ios::sync_with_stdio(0);
cin >> n >> q >> S;
for (int i = 0; i < S.size(); i++)
s[i] = (S[i] == '1');
if (n <= 100 && q <= 100)
Small();
}
Compilation message (stderr)
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