Submission #2200016

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Source Code Expand

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <queue>
#include <set>
#include <map>
#include <string.h>
#include <cmath>

using namespace std;
typedef long long i64;
typedef long double ld;
typedef pair<i64,i64> P;
#define rep(i,s,e) for(int (i) = (s);(i) <= (e);++(i))

int n;
i64 x;

int main()
{
	cin >> n >> x;
	int result = 0;

	for(int i = 0;i < n;i++)
	{
		int a;
		cin >> a;
		if(x & (1 << i))
		{
			result += a;
		}
	}

	cout << result << endl;
}
		

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