Submission #1026489

#	Time	Username	Problem	Language	Result	Execution time	Memory
1026489		vjudge1	Bliskost (COI23_bliskost)	C++17	100 / 100	120 ms	24396 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;
	int last=0;
	for(int i=0; i<n; i++){

		if(i%2)
		 sa+=(s[i]-t[i]+26)%26;
		else sb+=(s[i]-t[i]+26)%26;
	}


	if((sa%26)==(sb%26)) cout<<"da\n";
	else cout<<"ne\n";

	while(q--){
		int p; cin >> p; p--;
		char x; cin >> x;
		
		if(p%2){
			sa-=(s[p]-t[p]+26)%26;
			s[p]=x;
			sa+=(s[p]-t[p]+26)%26;
		}
		else{
			sb-=(s[p]-t[p]+26)%26;
			s[p]=x;
			sb+=(s[p]-t[p]+26)%26;	
		}
		if((sa%26)==(sb%26)) cout<<"da\n";
		else cout<<"ne\n";

	}

}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:25:6: warning: unused variable 'last' [-Wunused-variable]
   25 |  int last=0;
      |      ^~~~
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: 7 / 7
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 17 / 17
• Subtask 6: 43 / 43