Submission #1102681

#	Time	Username	Problem	Language	Result	Execution time	Memory
1102681		vjudge1	Rack (eJOI19_rack)	C++17	40 / 100	2 ms	340 KiB

rack

#include <iostream>
#include <vector>
#include <cstdio>

using namespace std;

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

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