#include <bits/stdc++.h>
#define f first
#define s second
#define mp make_pair
#define pb push_back
#define lp(i,a,n) for(int i=(a);i<=(int)(n);++i)
#define lpd(i,a,n) for(int i=(a);i>=(int)(n);--i)
#define mem(a,b) memset(a,b,sizeof a)
#define all(v) v.begin(),v.end()
#define println(a) cout <<(a) <<endl
#define sz(x) ((int)(x).size())
#define readi(x) scanf("%d",&x)
#define read2i(x,y) scanf("%d%d",&x,&y)
#define read3i(x,y,z) scanf("%d%d%d",&x,&y,&z)
#define readll(x) scanf("%I64d",&x)
#define mod 1000000007
#define eps 1e-6
#define infi 1e9
#define infll 1e18
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vll;
typedef set<int> si;
typedef map<int,int> mii;

const int N = 42;
ll n,a[N];

int main(){
    cin >>n;
    lp(i,1,n) readll(a[i]);

    sort(a+1, a+1+n);

    ll ans = 0, j = 0;
    lpd(i,n,1) ans += (1ll<<j) * a[i], ++j;
    cout <<ans;
}

//freopen("input.in","r",stdin);
//freopen("output.out","w",stdout);
//ios::sync_with_stdio(0);cin.tie(0);