//#pragma GCC optimize("O3") 
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx") 
//#define __USE_MINGW_ANSI_STDIO 0
#include <bits/stdc++.h>
#define TASK "triangle"
#define pb push_back
#define fi first
#define se second
using namespace std;

#ifdef LOCAL
	#define eprintf(...) fprintf(stderr, __VA_ARGS__)
#else
	#define eprintf(...) (void)42
#endif

// every true-boy doesn't read statement!

typedef long long ll;
typedef vector < ll > vi;
typedef long double ld;

const int MAXN = (int)4e5 + 22;

int n;
vector < ll > gg;

void solve() {
	cin >> n;
	gg.resize(n);
	for (int i = 0; i < n; i++)
		cin >> gg[i];
	sort(gg.begin(), gg.end());
	reverse(gg.begin(), gg.end());
	ll ans = 0;
	for (int i = 0; i < n; i++)
		ans += (gg[i] * (1LL << i));
	cout << ans;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
#ifdef LOCAL
	assert(freopen("xxx.in", "r", stdin));
	assert(freopen("xxx.out", "w", stdout));
#else
	//assert(freopen(TASK".in", "r", stdin));
	//assert(freopen(TASK".out", "w", stdout));
#endif
	solve();
	return 0;
}