Submission #954468

#	Time	Username	Problem	Language	Result	Execution time	Memory
954468		GrandTiger1729	Bliskost (COI23_bliskost)	C++17	100 / 100	146 ms	16820 KiB

Main

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

const int K = 26;
int main()
{
    cin.tie(0)->sync_with_stdio(0);
    int n, q;
    cin >> n >> q;
    string a, b;
    cin >> a >> b;
    int cur = 0;
    for (int i = 0; i < n; i++)
    {
        (cur += (i % 2 == 0 ? 1 : -1) * ((b[i] - a[i] + K) % K) + K) %= K;
    }
    cout << (cur == 0 ? "da" : "ne") << '\n';
    while (q--)
    {
        int i;
        char x;
        cin >> i >> x;
        i--;
        (cur += (i % 2 == 0 ? -1 : 1) * (x - a[i]) + K) %= K;
        a[i] = x;
        cout << (cur == 0 ? "da" : "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