做法

#include<iostream>
using namespace std;
int main(){
int a,b,c,d;
cin>>a>>b>>c>>d;
int sum=a+b+c+d;
int maxx=0;
int minn=0x3f;
if(a>maxx){
maxx=a;

}
if(a<minn){
	minn=a;
	
}
if(b>maxx){
	maxx=b;
	
}
if(b<minn){
	minn=b;
	
}
if(c>maxx){
	maxx=c;
	
}
if(c<minn){
	minn=c;
	
}
if(d>maxx){
	maxx=d;
	
}
if(d<minn){
	minn=d;
	
}
sum-=maxx+minn;
printf("%.2f",sum/2.0);
return 0;

}