Submission #1131617

#	Time	Username	Problem	Language	Result	Execution time	Memory
1131617		Hectonit	Bliskost (COI23_bliskost)	C++20	0 / 100	64 ms	320 KiB

Main

#include <bits/stdc++.h>

using namespace std;

using ll = long long;

void solve() {
    int n, q;
    cin >> n >> q;
    string a, b;
    cin >> a >> b;
    int sum = 0;
    for (int i = 0; i < n; i++) {
        int d = b[i] - a[i];
        if ((i + 1) % 2 == n % 2) {
            sum += d;
        } else {
            sum -= d;
        }
    }
    if (sum == 0) {
        cout << "da\n";
    } else {
        cout << "ne\n";
    }
    for (int i = 0; i < q; i++) {
        char c;
        int idx;
        cin >> idx >> c;
        int d = b[idx] - a[idx];
        if ((i + 1) % 2 == n % 2) {
            sum -= d;
        } else {
            sum += d;
        }
        a[idx] = c;
        d = b[idx] - a[idx];
        if ((i + 1) % 2 == n % 2) {
            sum += d;
        } else {
            sum -= d;
        }
        if (sum == 0) {
            cout << "da\n";
        } else {
            cout << "ne\n";
        }
    }
}

int main() {
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int t = 1;
    //cin >> t;
    while (t--) {
        solve();
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:52:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:53:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |     freopen("output.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