package com.javarush.task.pro.task05.task0507;

import java.util.Scanner;

/*
Максимальное из N чисел
*/

public class Solution {
    public static int[] array;

    public static void main(String[] args) throws Exception {
        Scanner console = new Scanner(System.in);
        int n = console.nextInt();
        array = new int[n];

        for (int i = 0; i < n; i++){
            array[i] = console.nextInt();
        }
        int max = array[0];

        for (int i = 1; i < array.length; i++){
            int number = array[i];
            if(number > max){
                max = number;
            }


        }
        System.out.println(max);
    }
}