Submission #1303131

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Source Code Expand

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

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 unsigned long long ull;
//typedef vector<int> vi;
//typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef pair<int, int> pii;
typedef vector<bool> vb;
typedef vector<string> vs;

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;
}

void init_global() {}

int main_() {
	cin.tie(0);
	ios::sync_with_stdio(false);

	ll N, X; cin >> N >> X;
	vl A(N); FOR(i, 0, N) cin >> A[i];

	ll t = X, i = 0;
	ll sum = 0;
	while (t > 0) {
		if (t & 0x01) sum += A[i];
		t >>= 1;
		i++;
	}

	cout << sum << endl;
	return 0;
}

Submission Info

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