Submission #944217

#	Time	Username	Problem	Language	Result	Execution time	Memory
944217		stefanneagu	Rack (eJOI19_rack)	C++17	100 / 100	4 ms	440 KiB

rack

#include <iostream>
#define int long long

using namespace std;

const int mod = 1e9 + 7;

int32_t main() {
  int n, k;
  cin >> n >> k;
  k --;
  int ans = 0;
  for(int i = 1; i <= n; i ++) {
    ans *= 2;
    ans += (k & 1);
    ans %= mod;
    k /= 2;
  }
  cout << (ans + 1) % mod;
  return 0;
}

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