#include"stdio.h"
int main()
{
int s=0,i,j=0,temp=0,n,b=0;
int a[n];
scanf("%d",&n);
for(i=0;i
{
scanf("%d",&a[i]);
}
for(i=0;i
{
for(j=i+1;j
{
if(a[i]>a[j])
{
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
s+=a[b]+a[b+1];
a[b+1]+=a[b];
a[b]=0;
b++;
}
printf("%d",s);
return 0;
}