Submission #1151120

#	Time	Username	Problem	Language	Result	Execution time	Memory
1151120		yamtllq	Rack (eJOI19_rack)	C++20	40 / 100	0 ms	328 KiB

rack

#include <bits/stdc++.h>

using namespace std;

const int mod = 1e9 + 7;

int main() {
    int n;
    long long k;
    cin >> n >> k;
    k--;
    long long reversed = 0;
    for (int i = 0; i < n; ++i) {
        reversed = (reversed << 1) | ((k >> i) & 1);
        reversed %= mod; 
    }
    cout << (reversed + 1) % mod << endl;
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 0 / 60