Submission #1026456

#	Time	Username	Problem	Language	Result	Execution time	Memory
1026456		vjudge1	Bliskost (COI23_bliskost)	C++17	0 / 100	0 ms	600 KiB

Main

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

#define int long long

void f(){
	#ifndef ONLINE_JUDGE
	freopen("in.txt", "r", stdin);
	freopen("out.txt", "w", stdout);
	#endif
}


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

	//f();

	int n, q; cin >>n >> q;

	vector<int> a(n);
	int sb=0, sa=0;
	string s, t; cin >> s>> t;
	for(int i=0; i<n; i++){
		if((s[i]-'a')%2) sa++, a[i]=1;
		if((t[i]-'a')%2) sb++;
	}


	if(sa%2!=sb%2) cout<<"ne"<<"\n";
	else cout<<"da"<<"\n";

	while(q--){
		int p; cin >> p; p--;
		char x; cin >> x; x--;
		x-='a'; 
		if(x%2!=a[p]){
			sa++;
			a[p]^=1;
		} 

		if(sa%2!=sb%2) cout<<"ne"<<"\n";
		else cout<<"da"<<"\n";
	}

}

Compilation message (stderr)

Main.cpp: In function 'void f()':
Main.cpp:8:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |  freopen("in.txt", "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:9:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |  freopen("out.txt", "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 8
• Subtask 3: 0 / 13
• Subtask 4: 0 / 12
• Subtask 5: 0 / 17
• Subtask 6: 0 / 43