#include <bits/stdc++.h>
using namespace std;
double getArea(double a,double b,double c){
	double p=(a+b+c)/2;
	return sqrt(p*(p-a)*(p-b)*(p-c));
}
double getHeight(double area, double side){
	return 2*area/side;
}
signed main(){
	double a,b,c;
	cin>>a>>b>>c;
	double area=getArea(a,b,c);
	cout<<setprecision(3)<<fixed<<max({getHeight(area,a),getHeight(area,b),getHeight(area,c)});	
}