using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("please Enter a segment");

        double a = double.Parse(Console.ReadLine());

        Console.WriteLine("please Enter a segment");

        double b = double.Parse(Console.ReadLine());

        double c2 = Math.Pow(a,2) + Math.Pow(b,2);

        double c = Math.Sqrt(c2);

        Console.WriteLine("c = " + c);

    }

}