using System;

​

public class Program

{

    static int PrintArray(int[] a)

 {   

    int i=0; 

        while   (i<a.Length && a[i]!=-1 &&  (a[i]!=0 && a[i+1]!=0)) 

    {

        i++;

     }

        return i;

 }  

    public static void Main()

    {

    int[] a = {4,5,6,7,8,-1,5,4,3,2}; 

        Console.WriteLine(PrintArray(a));

        for (int i=0; i<=PrintArray(a);i++) 

            {

            Console.WriteLine(a[i]);

        }

    }

}