tail-3

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("a = ");
            double a = Double.Parse(Console.ReadLine());
            Console.Write("b = ");
            double b = Double.Parse(Console.ReadLine());

            double y;
            if(b > 1)
            {
                y = (a*(Math.Sqrt(a*a + b*b)))/b;
            }
            else
            {
                if (Math.Sqrt(a*a + b*b) < 3)
                {
                    y = -a;
                }
                else y = -b;
            }

            Console.WriteLine("Program output:\ny = {0}", y);
        }
    }
}