import java.util.*;
import java.lang.*;
import java.io.*;

class Ideone
{
	public static void main (String[] args)
	{
		float a, b, c;
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter values: ");
        a = scanner.nextFloat();
        b = scanner.nextFloat();
        c = scanner.nextFloat();

        if (a + b >= c || b + c >= a || a + c >= b) {
			float p = (a + b + c) / 2;
            float S = (float) Math.sqrt(p * (p - a) * (p - b) * (p - c));
            float R = (a * b * c) / (4 * S);
            float r = S/p;
            System.out.println("Radius of incircle of triangle = " + r + "\nRadius of excircle of triangle = " + R);
            
        } else {
            System.out.println("Wrong input data. Triangle doesn't exist");}
	}
}