MaxNumber

import java.util.Scanner;

public class MaxNumber {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());
        int maxNum = Integer.MIN_VALUE;

        for (int i = 0; i < n; i++) {
            int num = Integer.parseInt(scanner.nextLine());

            if (num > maxNum) {
                maxNum = num;
            }
        }
        System.out.println(maxNum);


    }
}