Submission #1114261

#	Time	Username	Problem	Language	Result	Execution time	Memory
1114261		epicci23	Bliskost (COI23_bliskost)	C++17	100 / 100	134 ms	16620 KiB

Main

#include "bits/stdc++.h"
#define int long long
#define all(v) v.begin() , v.end()
#define sz(a) (int)a.size()
using namespace std;

void _(){
  int n,q;
  cin >> n >> q;
  string s,t;
  cin >> s >> t;
  array<int,2> pre = {0,0};
  for(int i = 0 ; i < n; i++){
    pre[i&1] += (t[i] - s[i] + 26) % 26;
  }	
  
  if((n-1)&1){
    if((pre[1]-pre[0])%26==0) cout << "da\n";
    else cout << "ne\n";
  }
  else{
  	if((pre[0]-pre[1])%26==0) cout << "da\n";
    else cout << "ne\n";
  }

  while(q--){
  	int ind;
  	char a;
  	cin >> ind >> a;
  	ind--;
    pre[ind&1]-=(t[ind]-s[ind]+26)%26;
    s[ind] = a;
    pre[ind&1]+=(t[ind]-s[ind]+26)%26;
    if((n-1)&1){
     if((pre[1]-pre[0])%26==0) cout << "da\n";
     else cout << "ne\n";
    }
    else{
  	 if((pre[0]-pre[1])%26==0) cout << "da\n";
     else cout << "ne\n";
    }
  }
}

int32_t main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tc=1;//cin >> tc;
  while(tc--) _();
  return 0;
}

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