```cpp
#include<iostream>
#include<iomanip>
using namespace std;
int main(){
double a,b,c,d,x,y,z=-1,o;
cin>>a>>b;
for(int e=1;e<=a;e++){
c=-1;d=9999999;x=0;
for(int f=1;f<=b;f++){
cin>>y;
if(y>c){
c=y;
}
if(y<d){
d=y;
}
x+=y;
}
x=(x-c-d)/(b-2);
if(x>z){
z=x;
}
}
cout<<fixed<<setprecision(2)<<z;
}
``
by chenyixiang @ 2022-09-24 16:52:45