Submission #1312353

#	Time	Username	Problem	Language	Result	Execution time	Memory
1312353		repmann	Bliskost (COI23_bliskost)	C++20	100 / 100	104 ms	6672 KiB

Main

#include <bits/stdc++.h>
using namespace std;
int N, Q;
string A, B;
int main()
{
  ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  cin >> N >> Q >> A >> B;
  int sum[2];
  sum[0] = sum[1] = 0;
  for(int i = 0; i < (N - 1); i++) sum[i & 1] += B[i] - A[i];
  if(((B[N - 1] - A[N - 1] + 26) % 26) == (((sum[N & 1] - sum[!(N & 1)]) % 26 + 26) % 26)) cout << "da\n";
  else cout << "ne\n";
  int i;
  char c;
  while(Q--)
  {
    cin >> i >> c;
    i--;
    if(i < (N - 1)) sum[i & 1] -= B[i] - A[i];
    A[i] = c;
    if(i < (N - 1)) sum[i & 1] += B[i] - A[i];
    if(((B[N - 1] - A[N - 1] + 26) % 26) == (((sum[N & 1] - sum[!(N & 1)]) % 26 + 26) % 26)) cout << "da\n";
    else cout << "ne\n";
  }

  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