Submission #4638591

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Source Code Expand

#include<bits/stdc++.h>

using namespace std;
long long n,m,sum,a[100005],k;
string s;
int main()
{
	cin>>n>>m;
	for(int i=1;i<=n;i++)
		cin>>a[i];
	for(int i=m;i>0;i/=2)
		s+=char(i%2+'0');
	for(int i=1;i<=n;i++)
		if(s[i-1]=='1') sum+=a[i];
	cout<<sum<<endl;
	
    
    return 0;
}

Submission Info

Judge Result