Submission #1260353

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Source Code Expand

#include <iostream>
#include <vector>
#include <algorithm>

#define ALL(a) (a).begin(), (a).end()
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define REP(i, n) FOR(i, 0, n)

using namespace std;

int main()
{
    int n, X;
    cin >> n >> X;

    vector<int> a(n);
    REP(i, n)
        cin >> a[i];

    int p = 0;
    REP(i, n)
    {
        if (X & 1)
        {
            p += a[i];
        }

        X >>= 1;
    }
    cout << p << endl;
}

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