Submission #1048619

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Source Code Expand

#define _CRT_SECURE_NO_WARNINGS
#include <bitset>
#include <cstdio>
#include <cstring>
#include <vector>
using namespace std;

int main()
{
    int n, X;
    if (scanf("%d", &n) < 1) return 0;
    if (scanf("%d", &X) < 1) return 0;

    bitset<20> x(X);

    vector<int> a;
    a.resize(n);

    int sum = 0;
    for (int i = 0; i < n; i++)
    {
        if (scanf("%d", &a[i]) < 1) return 0;
        if (x[i]) sum += a[i];
    }

    printf("%d\n", sum);
    return 0;
}

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