Submission #290405

#	Time	Username	Problem	Language	Result	Execution time	Memory
290405		dolijan	Rack (eJOI19_rack)	C++14	100 / 100	9 ms	384 KiB

rack

#include <bits/stdc++.h>
using namespace std;
const long long mod=1e9+7;
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	long long n,k;
	cin>>n>>k;
	k--;
	long long num=0;
	for(long long i=0;i<n;i++)
	{
		num=((2LL*num)%mod+(k%2))%mod;
		k/=2;
	}	
	num++;
	num%=mod;
	cout<<num<<endl;
	return 0;
}

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