Submission #1101793

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101793		vjudge1	Rack (eJOI19_rack)	C++17	40 / 100	1 ms	504 KiB

rack

#include <iostream>
#include <cstdio>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    m--;
    int out = 0;
    for(int i = 0; i < min(64, n); i++) {
        out |= ((m & (1 << i)) >> i) << (n - i - 1);
    }
    out++;
    out %= 1000000007;
    for(int i = 64; i < n; i++) {
        out *= 2;
        out %= 1000000007;
    }
    cout << out << '\n';
    return 0;
}

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