using System;

namespace _06.MaxNumber
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int maxNumberR = int.MinValue;

            string inputT = Console.ReadLine();

            while (inputT != "Stop")
            {
                int currentNumber = int.Parse(inputT);
                if (currentNumber > maxNumberR)
                {
                    maxNumberR = currentNumber;
                }
                inputT = Console.ReadLine();
            }
            Console.WriteLine(maxNumberR);
        }
    }
}