思路清晰的屎山代码（能AC）

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b,c,d;
	cin>>a>>b>>c>>d;
	int maxx,maxxx,maxxxx;
	maxx=max(a,b);
	maxxx=max(maxx,c);
	maxxxx=max(maxxx,d);
	int minn,minnn,minnnn;
	minn=min(a,b);
	minnn=min(minn,c);
	minnnn=min(minnn,d);
	double sum=a+b+c+d;
	sum=sum-maxxxx-minnnn;
	double summ;
	summ=sum/2;
	printf("%.2f",summ);
	
	
}[:白眼]