using System;

public class Program

{

    public static void Main()

    {

        //Find the maximum consecutive 1’s in an array of 0’s and 1’s. 

//Input:         00110001001110 

        //Output:   3 (max num of 1s together is 3)

​

        int []arr = {1,1,1,1,0,0,0,1,0,0,1,1,1,0, 0, 0, 1};

        int lengthArr = arr.Length;

        int count = 0;

        int ans = 0;

        for(int i = 0; i < lengthArr; i++)

        {

            if (arr[i] == 0)

            {

                count = 0;

            }

            else

            {

                count = count + 1;

                if (ans < count)

                {

                    ans = count;

                }

            }

        }

        Console.WriteLine(ans);

    }

}