#include<bits/stdc++.h> using namespace std; double max(double a,double b,double c){ double maxn; if(a>b){ maxn=a; }else maxn=b; if(c>maxn){ return c; }else return maxn; } int main() { double a,b,c; cin>>a>>b>>c; double m=max(a,b,c)/(max(a+b,b,c)*max(a,b,b+c) ); cout<<fixed<<setprecision(3)<<m; return 0; }