#include<fstream>
#include<algorithm>
using namespace std;
ifstream f("avioane.in");
ofstream g("avioane.out");
int a[100001],v,n,sm,i,j,x,x1;
void citire(){
	f>>n;
	for(i=1;i<=n;++i)
		f>>a[i];
	sort(a+1,a+n+1);
	for(i=1;i<=n;++i){
		v=(n-i+1)*a[i];
		if(a[i]!=a[i-1]){
			x1=0;
			for(j=i;j<=n;++j)
			 if(a[j]!=a[j-1]){	
				x=(n-j+1)*(a[j]-a[i]);
				if(x>x1) x1=x;
			}
			v+=x1;
			if(sm<v) sm=v;
		}
	}
}
int main(){
	citire();
	g<<sm<<'\n';
	g.close();
	return 0;
}