using System;

​

public class Program

{

    public int harambe(int[] arr){

    int len = arr.Length;

    int order = 1;

    int maxorder = 1;

​

    Array.Sort(arr);        

    for(int x=0; x < len-1; x++) {

        if (arr[x+1] == arr[x]+1)

        {

            order += 1;

            if (order > maxorder){

                maxorder = order;

            }

        }

        else{

            order = 1;

        }

        Console.Write(order);

    }

​

    return maxorder;

    }

    public static void Main()

    {

        Program a = new Program();

        int[] arr =  { 103, 50, 60, 4, 10, 3, 1, 70, 90 , 91 , 92 , 2};

        int b = a.harambe(arr);

        Console.Write('{');

            Console.Write( b.ToString() );

        Console.Write('}'); 

    }   

}