贪心过不了的，要用堆
by 时崎狂三老公 @ 2020-11-20 15:03:12
贪心还有 $ 10 $ 分，震惊！！
by Kacho @ 2021-01-08 20:45:21
堆AC代码：
```cpp
#include<iostream>
#include<cstdio>
#include<queue>
using namespace std;
priority_queue<int,vector<int>,greater<int> > heap;
int main(){
int n,ans=0;
cin>>n;
for(int i=1;i<=n;i++){
int s;
cin>>s;
heap.push(s);
}
for(int i=1;i<=n-1;i++){
int a=heap.top();
heap.pop();
int b=heap.top();
heap.pop();
ans+=(a+b);
heap.push(a+b);
}
cout<<ans;
}
```
by _melon @ 2021-03-26 06:22:47