？。这也能过？

#include<bits/stdc++.h>
using namespace std;
int main()
{
double a,b,c,d,max,min,sum;
cin>>a>>b>>c>>d;
if(a<=b&&a<=c&&a<=d)a=min;
else if(b<=a&&b<=c&&b<=d)b=min;
else if(c<=a&&c<=b&&c<=d)c=min;
else if(d<=a&&d<=b&&d<=c)d=min;
if(a>=b&&a>=c&&a>=d)a=max;
else if(b>=a&&b>=c&&b>=d)b=max;
else if(c>=a&&c>=b&&c>=d)c=max;
else if(d>=a&&d>=b&&d>=c)d=max;
sum=a+b+c+d-min-max;
sum=1.0*sum/2;
printf("%0.2lf",sum);
return 0;
}