using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TheGreaterNumberLoops
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            int max = -2147483647;
            if (N > 0)
            {
                for (int i = 0; i < N; i++)
                {
                    int Num = int.Parse(Console.ReadLine());
                    if (max < Num)
                    {
                        max = Num;
                    }
                }
                Console.WriteLine(max);
            }
        }
    }
}