Take_the_plane_down

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

namespace Problem_2___Take_the_plane_down
{
    class Program
    {
        static void Main(string[] args)
        {
            long headquarterX = long.Parse(Console.ReadLine());
            long headquarterY = long.Parse(Console.ReadLine());
            long distance = long.Parse(Console.ReadLine());
            long planesNumbers = long.Parse(Console.ReadLine());

            for (long i = 0; i < planesNumbers; i++)
            {
                long planeX = long.Parse(Console.ReadLine());
                long planeY = long.Parse(Console.ReadLine());

                long distanceX = headquarterX - planeX;
                long distanceY = headquarterY - planeY;

                double c = Math.Sqrt((distanceX * distanceX) + (distanceY * distanceY));

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


            }


        }
    }
}