using System;

namespace biggest_number
{
    class Program
    {
        static void Main(string[] args)
        {
            int number = int.Parse(Console.ReadLine());
            int k = int.Parse(Console.ReadLine());
            int j = 0;
            while (j != number)
            {
                ++j;
                if (j == number)
                {
                    break;
                }
                k = int.Parse(Console.ReadLine());


            }
            int maxNumber = int.MinValue;
            if (k > maxNumber)
            {
                maxNumber = k;
            }
            Console.WriteLine(k);


        }
    }
}