using  System;

namespace demo4
{
	class descompose
	{
		static uint[] iArray = new uint[100];

		public static void Main(String[] args)
		{
			uint n = 0;
			//bool inp = true;
			Console.WriteLine("Please input a number whose type is unit:");
			/*while(inp == true)
			{

				if(uint.TryParse(Console.ReadLine(),out n) == false)
				{
					Console.WriteLine("输入不合法！");
					inp = true;
				}
				else
				{
					iArray[0] = n;
					inp = false;
					break;
				}
			}*/
              while (!uint.TryParse(Console.ReadLine(),out n))
			Console.WriteLine("格式不正确，重新输入：\n");
			iArray[0] = n;
			uint k = 1;
			decompose(n,k);
		}

		private static void decompose(uint n,uint k)
		{
			uint i = (n < iArray[k - 1]) ? n : iArray[k - 1];
			while (i > 0)
			{
				iArray[k] = i;
				if(i == n)
				{
					Console.Write("\r\n{0} = {1}",iArray[0],iArray[1]);
					for(uint j = 2; j <= k; j++)
					{
						Console.Write("+ {0}",iArray[j]);
					}
			    }
				else
				{
					decompose(n - i,k + 1);
				}
				i--;
			}
		}
	}
}