using System;

public class Program

{

    static void printArray(int[] a){

        int zeroCount = 0;

        for (int i = 0; i<a.Length; i++){

            if (a[i] == 0) {

                zeroCount += 1;

            }

            // no consecutive 0s

            else{

                zeroCount = 0;}

            if (zeroCount == 2 || a[i] == -1) {

                break;  

            }

            Console.WriteLine(a[i]);

        }

        return;

    }

    public static void Main()

    {

        int[] a = {4,5,0,7,8,0, 0,5,4,3,2}; 

        printArray(a);

    }

}