using System;

public class Program

{

    public static void Main()

    {

        int arr_length = 20;

        int[] arr = new int[arr_length];

        Random rand = new Random();

        for (int i = 0; i < arr_length ; i++){

            arr[i] = rand.Next(0, 101); 

        }

        int highest_distance = 0;

        for (int i = 0 ; i < arr_length - 1 ; i++){

            int current_distance = Math.Abs(arr[i+1] - arr[i]);

            if (current_distance > highest_distance) {

                highest_distance = current_distance;

            }

        }

        Console.WriteLine(highest_distance);

    }

}