DecimalToHexadecimalNumber

using System;

namespace Decimal_to_Hexadecimal_Number
{
	class DecimalToHexadecimalNumber
	{
		public static void Main(string[] args)
		{
			long n = long.Parse(Console.ReadLine());
			string hexConnect = "";
			while (n != 0)
			{
				long remain = n % 16;
				n /= 16;
				switch (remain)
				{
					case 10: hexConnect = "A" + hexConnect; break;
				case 11: hexConnect = "B" + hexConnect; break;
			case 12: hexConnect = "C" + hexConnect; break;
		case 13: hexConnect = "D" + hexConnect; break;
	case 14: hexConnect = "E" + hexConnect; break;
case 15: hexConnect = "F" + hexConnect; break;
default: hexConnect = remain + hexConnect; break;
				}
			}
			Console.WriteLine(hexConnect);
			Console.ReadKey(true);
		}
	}
}