Generate rectangle

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

namespace Exercise_12_Generate_rectan
{
    class Program
    {
        static void Main(string[] args)
        {

            // 04:49 -  05:26

            int n = int.Parse(Console.ReadLine());
            int m = int.Parse(Console.ReadLine());

            int areaRectangle;
            int cnt = 0;

            if ( n < 1)
            {
                Console.WriteLine("No");
                return;
            }



            for (int num1 = 0; num1 >= -n; num1--)
            {
                for (int num2 = 0; num2 >= -n; num2--)
                {
                    for (int num3 = 0; num3 <= n; num3++)
                    {
                        for (int num4 = 0; num4 <= n; num4++)
                        {

                            //areaRectangle = Math.Abs(num3 - num1) * Math.Abs(num4 - num2);
                            areaRectangle = (num3 - num1) *(num4 - num2);


                            if (areaRectangle >= m)
                            {
                                Console.Write("({0}, {1}) ({2}, {3}) -> {4}",
                                num1, num2, num3, num4, areaRectangle);

                                Console.WriteLine();
                                cnt++;
                            }

                        }
                    }
                }

            }

            if (cnt == 0)
            {
                Console.WriteLine("No");
            }


        }
    }
}