RT，code如下

#include<bits/stdc++.h>
using namespace std;
int n;
long long sum,ans;
priority_queue<int>p;
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n;
    for(int i=1;i<=n;i++){
        int t;
        cin>>t;
        sum+=t;
        p.push(t);
    }
    for(int i=n;i>1;i--){
        ans+=sum;
        sum-=p.top();
        p.pop();
    }
    cout<<ans<<endl;
    return 0;
}