﻿using System;

namespace exercise_2_Part_1
{
   
        class MainClass
        {
            public static void Main(string[] args)
            {
                double R1 = 0, R2 = 0;
                double area1 = 0, area2 = 0;
                double diff = 0;
                string str;

                Console.WriteLine("Enter the value of radii for area 1: ");
                str = Console.ReadLine();
                R1 = Convert.ToDouble(str);

                Console.WriteLine("Enter the value of radii for area 2: ");
                str = Console.ReadLine();
                R2 = Convert.ToDouble(str);

                area1 = 3.14 * R1 * R1;
                area2 = 3.14 * R2 * R2;

                diff = area2 - area1;

                Console.WriteLine("The value of shared area is: " + diff);

                Console.ReadLine();

            }
        }
    }