Submission #446710

#	Time	Username	Problem	Language	Result	Execution time	Memory
446710		fuad27	Rack (eJOI19_rack)	C++14	100 / 100	10 ms	236 KiB

rack

#include<bits/stdc++.h>
using namespace std;
#define mod 1000000007ll
#define int long long
int32_t main () {
	int n, k;
	cin >> n >> k;
	int ans = 0;
	k--;
	for(int i = 0;i<n;i++) { 
		ans = (((ans*2))%mod + k%2)%mod;
		k/=2;
	}
	cout<<(++ans)%mod<<endl;
}

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