제출 #530383

#제출 시각아이디문제언어결과실행 시간메모리
530383PiokemonRack (eJOI19_rack)C++17
40 / 100
1 ms312 KiB
#include <bits/stdc++.h>
using namespace std;

long long int const m = 1000000007;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    long long int n,k,odp;
    cin >> n >> k;
    odp = 1;
    k -= 1;
    for (int x=0;x<n;x++){
        odp = (odp*2 + (k%2)) % m;
        k = k/2;
    }
    cout << odp - pow(2,n) + 1<< "\n";
}
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