#include <bits/stdc++.h>
#define Nmax 47
#define FOR(i, l, r) for(int i=l; i<=r; ++i)
using namespace std;
typedef unsigned long long ull;

bool cmp(int a, int b) {
    return a > b;
}

ull pow(int n, int m) {
    if (m == 1) return  n;
    else if (m == 0) return 1;
    ull tmp = pow(n, m/2);
    if (m%2 == 1) return tmp*tmp*n;
    else return tmp*tmp;
}

int main() {
    ull n, c[Nmax], res = 0;
    cin >> n;
    FOR(i, 0, n-1) cin >> c[i];
    sort(c, c+n, cmp);
    FOR(i, 0, n-1) {
        res += c[i]*pow(2, i);
    }
    cout << res;
    return 0;
}