using System;

​

namespace Project_3

{

    class Program

    {

        public static void Main()

        {

            int n;

            Console.Write("Nhap vao n = ");

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

​

            bool kq = KiemTraSNT.kiemTraSNT(n);

​

            if (kq == true)

            {

                Console.WriteLine("La so nguyen to.");

            }

            else

            {

                Console.WriteLine("Khong La so nguyen to.");

​

            }

        }

    }

}