using System;

namespace CompteARebours
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			Console.Write("saisissez n : ");
			int n = int.Parse(Console.ReadLine());
			
			/*****************************************/
			Console.WriteLine("* version Tant que *");
			int itq = n;
			while(itq >= 0)
			{
				Console.Write(itq + " ");
				itq--;
			}
			
			/*****************************************/
			Console.WriteLine("\n* version Repeter *");
			int irj = n;
			do
			{
				Console.Write(irj + " ");
				irj--;
			}
			while(irj >= 0);
						
			/*****************************************/
			Console.WriteLine("\n* version pour *");
			for(int ip = n ; ip >= 0 ; ip--)
				Console.Write(ip + " ");
			
		}
	}
}