Submission #1077786

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077786		raduv	Rack (eJOI19_rack)	C++17	100 / 100	5 ms	436 KiB

rack

#include <bits/stdc++.h>
const int MOD = 1'000'000'007;

int main()
{
    int n, i;
    long long k, ans;
    scanf("%d%lld", &n, &k);
    ans = 0;
    k--;
    for( i = 0; i < n; i++ ){
      ans = (ans * 2 + k % 2) % MOD;
      k /= 2;
    }
    printf("%d\n", (ans + 1) % MOD);
    return 0;
}

Compilation message (stderr)

rack.cpp: In function 'int main()':
rack.cpp:15:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   15 |     printf("%d\n", (ans + 1) % MOD);
      |             ~^     ~~~~~~~~~~~~~~~
      |              |               |
      |              int             long long int
      |             %lld
rack.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     scanf("%d%lld", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 60 / 60