Submission #998131

#	Time	Username	Problem	Language	Result	Execution time	Memory
998131		MilosMilutinovic	Bliskost (COI23_bliskost)	C++14	100 / 100	181 ms	16004 KiB

Main

#include <bits/stdc++.h>
using namespace std;
const int N = 1e6 + 10;
int n, q;
char s[N], t[N];
int main() {
    scanf("%d%d", &n, &q);
    scanf("%s", s + 1);
    scanf("%s", t + 1);
    int d = 0;
    for (int i = 1; i < n; i++)
        d = (d + (t[i] - 'a') * (i % 2 == (n - 1) % 2 ? 1 : -1) + (s[i] - 'a') * (i % 2 == (n - 1) % 2 ? -1 : 1) + 52) % 26;
    if (((((int) (s[n] + d) % 26) + 52) % 26) == ((int) t[n] % 26)) printf("da\n");
    else printf("ne\n");
    while (q--) {
        int p;
        char c;
        scanf("%d %c", &p, &c);
        if (p < n) d = (d - ((t[p] - 'a') * (p % 2 == (n - 1) % 2 ? 1 : -1) + (s[p] - 'a') * (p % 2 == (n - 1) % 2 ? -1 : 1)) + 52) % 26;
        s[p] = c;
        if (p < n) d = (d + (t[p] - 'a') * (p % 2 == (n - 1) % 2 ? 1 : -1) + (s[p] - 'a') * (p % 2 == (n - 1) % 2 ? -1 : 1) + 52) % 26;
        if (((((int) (s[n] + d) % 26) + 52) % 26) == ((int) t[n] % 26)) printf("da\n");
        else printf("ne\n");
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |     scanf("%d%d", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     scanf("%s", s + 1);
      |     ~~~~~^~~~~~~~~~~~~
Main.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%s", t + 1);
      |     ~~~~~^~~~~~~~~~~~~
Main.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         scanf("%d %c", &p, &c);
      |         ~~~~~^~~~~~~~~~~~~~~~~

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