/*
TASK:ots
LANG:C++
*/
#include <iostream>
#include <algorithm>
using namespace std;
int a[1000000];
int main ()
{
int i=0,j,n,br=0;
scanf("%d",&n);
for(i=0;i<n;i++)
     {
      scanf("%d",&a[i]);
      }
sort(a,a+n);
br+=a[1]-a[0];
//cout<<br<<endl;
if(n==1){printf("0\n");exit(0);}
if(n>2)br+=a[n-1]-a[n-2];
//cout<<br<<endl;
for(i=2;i<n-2;i++)
    {
     if(a[i]-a[i-1]<a[i+1]-a[i])br+=a[i]-a[i-1];
//     cout<<a[i]-a[i-1]<<"     "<<a[i+1]
     else br+=a[i+1]-a[i];
//     cout<<br<<endl;
     }
printf("%d\n",br);
}
