using System;

public class Program

{

    public static void Main()

    {

        string text = Console.ReadLine();

        int maxNum= int.MinValue;

        while(text!= "Stop")

        {

            int currentNum= int.Parse(text);

            if (currentNum >= maxNum)

            {

                maxNum=currentNum;

            }

            text = Console.ReadLine();

        }

        Console.WriteLine(maxNum);

    }

}