Take_The_Plane_Down

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

namespace _02.Take_The_Plane_Down
{
    class Program
    {
        static void Main(string[] args)
        {
            //•   On the first line you will be given the X of your headquarter.
            double headquarterX = double.Parse(Console.ReadLine());
            //•   On the second line you will be given the Y of your headquarter.
            double headquarterY = double.Parse(Console.ReadLine());
            //•   On the third line you will be given the distance from your headquarter to the borders.
            double distanceToBorder = double.Parse(Console.ReadLine());
            //•   On the fourth line you will be given the number of the planes that are approaching
            double numberOfPlanes = double.Parse(Console.ReadLine());
            int counter = 0;

            //On the next 2 * N lines you will be given:
            while (counter < numberOfPlanes)
            {
                //•   On the every odd line you will be given the plane X coordinate
                double planeX = double.Parse(Console.ReadLine());
                //•   on the every even line you will be given the plane Y coordinate
                double planeY = double.Parse(Console.ReadLine());
                counter++;
                bool isInside = Math.Pow(headquarterX - planeX, 2) + Math.Pow(headquarterY - planeY, 2)
                    <= Math.Pow(distanceToBorder, 2);

                if (isInside)
                {
                    Console.WriteLine("You destroyed a plane at [{0},{1}]",planeX,planeY);
                }
            }
        }
    }
}