题解

#include<bits/stdc++.h>
using namespace std;
float a[4];
int maxx,minn;
int main()
{
	cout<<fixed<<setprecision(2);
	cin>>a[0]>>a[1]>>a[2]>>a[3];
	maxx=max(a[0],max(a[1],max(a[2],a[3])));
	minn=min(a[0],min(a[1],min(a[2],a[3])));
	cout<<(a[0]+a[1]+a[2]+a[3]-maxx-minn)/2;
        return 0;
}