#include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;
int main()
{
    long long int sum,a,b,c,d,e,f,g,h,i,j,k,l,array[5000],ans;
    while(a!=0)
    {
        cin>>a;
        for(i=0;i<a;i++)
        {
            cin>>array[i];
        }
        j=0;ans=0;
        while(j<a)
        {
            sort(array,array+a);
            array[j+1]=array[j]+array[j+1];
            array[j]=0;
            if(j!=a-1)ans+=array[j+1];
            j++;
        }
        if(a!=0)cout<<ans<<"\n";//array[a];
    }
    return 0;
}