来个两行代码好吧~

#include<bits/stdc++.h>
using namespace std;int main(){int n,a[11451],ans=0;cin>>n;for(int i=1;i<=n;i++)cin>>a[i];sort(a+1,a+n+1);for(int i=1;i<n;i++){a[i+1]+=a[i];ans+=a[i+1];sort(a+i,a+1+n);}cout<<ans;return 0;}

拜咯