#include<bits/stdc++.h>
using namespace std;

using Lint=long long;

int main()
{
   int N; cin>>N;
   vector<int> a(N);
   for(int i=0;i<N;i++) cin>>a[i];
   sort(a.begin(),a.end());

   vector<Lint> sum(N+1);
   for(int i=0;i<N;i++) sum[i+1]=sum[i]+a[i];

   Lint ans=0;
   for(int i=0;i<N;i++){
      int ok=0,ng=min(i,N-(i+1))+1;
      while(ng-ok>1){
         int mid=(ok+ng)/2;
         if(a[i-mid]+a[N-mid]-2*a[i]>0) ok=mid;
         else ng=mid;
      }
      ans=max(ans,(sum[i]-sum[i-ok])+(sum[N]-sum[N-ok]-2LL*ok*a[i]));
   }
   cout<<ans<<endl;
   return 0;
}