/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.math.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner x = new Scanner(System.in);
		double a,b,c ;
		a = x.nextDouble();
		b = x.nextDouble();
		c = x.nextDouble() ;
		if (a + b >= c && b + c >= a && a + c >= b)
		{
			double p = (a + b + c)/2; 	
			double S = Math.sqrt(p * (p - a) * (p - b) * (p - c));
			double r = S/p;
			double R = (a*b*c)/4*S;
			System.out.format("Радиус вписанной окружности равен = %f\n",r);
			System.out.format("Радиус описанной окружности равен = %f ",R);
		}
		else
		{
			System.out.print("Не существует");
		}
			
 
 
 
	}
}