using System;
using System.Linq;
using System.Collections.Generic;

namespace RemoveNegativesAndReverse
{
	class MainClass
	{
		public static void Main(string[] args)
		{
			var numbers = Console.ReadLine().Split(' ').Select(int.Parse).ToList();
			var results = new List<int>();

			for (int i = numbers.Count - 1; i >= 0; i--)
			{
				if (numbers[i] > 0)
				{
					results.Add(numbers[i]);
				}
				else
				{
					results.Remove(numbers[i]);
				}
			}

			foreach (var items in results)
			{
				Console.Write("{0} ", items);
			}
		}
	}
}