using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter your number here: ");

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

            string hex = String.Empty;

            int remainder = int.MaxValue;

​

            while(decim > 0)

            {

                remainder = decim % 16;

                decim /= 16;

                if(remainder > 9)

                {

                    hex += (char)(65 + remainder - 10);

                }

                else

                {

                    hex += (char)('0' + remainder);

                }

            }

​

            for(int i =hex.Length-1; i>=0; i--)

            {

                Console.Write(hex[i]);

            }

            Console.WriteLine();

    }

}