# | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
---|---|---|---|---|---|---|---|
1249904 | Petrix | Rack (eJOI19_rack) | C++20 | 4 ms | 328 KiB |
#include <iostream>
using namespace std;
#define MOD 1000000007
int main()
{
long long n,k,rasp=0,i;
cin>>n>>k;k--;
for(i=1;i<=n;i++){
rasp=(rasp*2+k%2)%MOD;
k/=2;
}
cout<<(rasp+1)%MOD;
return 0;
}
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