using System;

public class Program

{

    public static void Main()

    {

        int num,x,mone=0;

        Console.WriteLine("please enter arry size:");

        num= int.Parse(Console.ReadLine());

        int[] arr = new int[num];

        for(x=0;x< arr.Length;x++)

        {

        Console.WriteLine("please enter next number:");

        arr[x]= int.Parse(Console.ReadLine());

            if(x<arr[x])

            mone++;

            if(mone==num)

            Console.WriteLine("סדר עולה");

        }

    }

}