题解

#include <bits/stdc++.h>
using namespace std;
int max3(double a,double b,double c)
{
if(a>b&&a>c) return a;
if(b>c) return b;
return c;
}
int main(){
double a,b,c,m;
scanf("%lf%lf%lf",&a,&b,&c);
m=(double)max3(a,b,c)/(double)max3(a+b,b,c)/(double)max3(a,b,b+c);
printf("%.2lf",m);
return 0;
}