Submission #545243

#	Time	Username	Problem	Language	Result	Execution time	Memory
545243		amunduzbaev	Street Lamps (APIO19_street_lamps)	C++17	0 / 100	5084 ms	18128 KiB

street_lamps

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

#define ar array

signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n, q; cin>>n>>q;
	vector<string> s(q + 1);
	cin>>s[0];
	for(int i=1;i<=q;i++){
		s[i] = s[i-1];
		string t; cin>>t;
		if(t == "query"){
			int l, r; cin>>l>>r;
			--l, --r;
			int res = 0;
			for(int j=0;j<i;j++){ bool ok = 1;
				for(int k=l;k<=r;k++){
					if(s[j][k] == '0') ok = 0;
				} res += ok;
			}
			
			cout<<res<<"\n";
		} else {
			int p; cin>>p;
			s[i][--p] = 2 * '1' - s[i][p];
		}
	}
}

Compilation message (stderr)

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:28:9: warning: operation on 'p' may be undefined [-Wsequence-point]
   28 |    s[i][--p] = 2 * '1' - s[i][p];
      |         ^~~

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