#include <iostream>
#include <fstream>
#include <algorithm>
#define Nmax 100001
using namespace std;
ifstream in("galagie.in");
ofstream out("galagie.out");
int n,a[Nmax];
long long l,sp[Nmax];
int main()
{
    in>>n;
    for(int i=1;i<=n;i++)
    {
        in>>a[i];
    }
    sort(a+1,a+n+1);
    for(int i=1;i<=n;i++)
    {
        sp[i]=sp[i-1]+a[i];
    }
    for(int i=n;i>=2;i--)
    {
        l+=a[i]*(i-1)*1LL-sp[i-1];
    }
    l*=2*1LL;
    out<<l;
    return 0;
}