using System;

public class Program

{

    public static void Main()

    {

        int[] arr=new int[]{1,2,5,9,1,5,70,15,215,-10,18,40,451,80};

        int max=0;

        foreach(int x in arr){

            if (x>max){

            max=x;

            }

        }

        Console.WriteLine(max);

    }

}