//Input: 00110001001110 

//Input: 1000010001 

using System;

public class Program

{

    public static void Main()

    { 

     int[] arr1={0,0,1,1,0,0,0,1,0,0,1,1,1,0};

     //int[] arr2={1,0,0,0,0,1,0,0,0,1};

     Console.WriteLine(Mcones(arr1));

    // Console.WriteLine(Mcones(arr2));

    }

    public static int Mcones(int[] nums)

    {

        int mones=0;

        int currentone=0;

        foreach(int num in nums)

        {

         if(num==1)

         {

          currentone++;

          mones=Math.Max(mones, currentone);

         }

         else

         { 

          currentone=0;

         }

    }

        return mones;

    }

}

​