MaxNumber

using System;

namespace HelloSoftUni
{
	class Program
	{
		static void Main(string[] args)
		{
			string input = Console.ReadLine();
			double max = double.MinValue;
			while (input != "Stop")
			{
				double number = double.Parse(input);
				if (max < number)
					max = number;
				input = Console.ReadLine();
			}
			Console.WriteLine(max);
		}

	}

}