```cpp
#include<bits/stdc++.h>//万能库
using namespace std;
int main() {
int n,m,arr[110]={0},temp;
cin>>n>>m;
for(int i=0;i<n;i++) {
int max_num=INT_MIN,min_num=INT_MAX;
for(int j=0;j<m;j++) {
cin>>temp;
arr[i]+=temp;
max_num=max(temp,max_num);
min_num=min(temp,min_num);
}
arr[i]-=max_num+min_num;
}
sort(arr,arr+n);
printf("%.2lf",double(arr[n-1])/(m-2));
return 0;
}
```
by xiangzhenze611 @ 2024-02-12 10:58:26