Submission #1229275

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Source Code Expand

#include "bits/stdc++.h"
#include <regex>

using namespace std;

#ifndef _DEBUG
#define main_ main
#endif
#define FOR(i,s,e) for (int i = int(s); i != int(e); i++)
#define INF (INT_MAX/2)
#define EPS (1.0e-8)
#define LINF (LONG_MAX/2)

typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;

template <typename T>
using keyVal = pair<string, T>;
template<typename T>
bool val_greater(const keyVal<T>& left, const keyVal<T>& right) {
	return left.second > right.second;
}

int main_() {
	int n, X;
	cin >> n >> X;
	vi a(n);
	FOR(i, 0, n) {
		cin >> a[i];
	}

	int mask = 0x0001;
	int sum = 0;
	for (int k = 0; k < n; ++k) {
		if (X&mask) sum += a[k];
		mask <<= 1;
	}

	cout << sum << endl;

	return 0;
}

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