using System;
public class Program
{
public static void Main()
int count = int.Parse(Console.ReadLine());
int temp = 0;
int input;
for (int i = 1; i <= count; i++)
input = int.Parse(Console.ReadLine());
//Console.WriteLine(input);
if (temp < input)
temp = input;
if (i >= count)
Console.WriteLine(input);
}