#include<bits/stdc++.h> using namespace std; int f[100009],cnt=0; int main() { //freopen("power.in","r",stdin); //freopen("power.out","w",stdout); int t; cin>>t; for(int i=1;i<=t;i++) { cin>>f[i]; } sort(f+1,f+1+t); for(int i=1;i<t;i++) { cnt+=f[i]+f[i+1]; } cout<<cnt; return 0; }