为什么不用堆来维护呢？
```
#include<bits/stdc++.h>
using namespace std;
int main()
{
int n;
cin>>n;
priority_queue<int,vector<int>,greater<int>> heap;
while(n--){
int x;
cin>>x;
heap.push(x);
}
int res=0;
while(heap.size()>1){
int a=heap.top();
heap.pop();
int b=heap.top();
heap.pop();
res=res+a+b;
heap.push(a+b);
}
cout<<res;
}
```
by Wiales_Pretharp @ 2022-03-11 11:02:15
您确定您的规律是对的吗（？）
by chenzida @ 2022-03-11 11:28:47