public class Solution

{

    public bool CanPlaceFlowers(int[] flowerbed, int n)

    {

        int count = 0;

        if (flowerbed.Length == 1)

        {

            if (flowerbed[0] == 0)

            {

                count++;

            }

        }

​

        if (flowerbed.Length == 2)

        {

            if (flowerbed[0] == 0 && flowerbed[1] == 0)

            {

                count++;

            }

        }

​

        if (flowerbed.Length >= 3)

        {

​

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

            {

                if (flowerbed[i] == 1)

                {

                    continue;

                }

​

                if (flowerbed[i] == 0 )

                {

                    if (i == 0)

                    {

​

​

                        if (i + 1 < flowerbed.Length && flowerbed[i + 1] == 0 && i + 2 < flowerbed.Length

                   && flowerbed[i + 2] == 0)

                        {

                            flowerbed[i] = 1;

                            count++;

                            i++;

                            continue;

                        }

​

                        if (i + 1 < flowerbed.Length

                            && flowerbed[i + 1] == 0

                            && i + 2 < flowerbed.Length

                            && flowerbed[i + 2] == 1)

                        {

                            flowerbed[i] = 1;

                            count++;

                            i++;

                            continue;

                        }

                    }

                    if (i - 1 >= 0 && flowerbed[i - 1] == 0 && i + 1 < flowerbed.Length && flowerbed[i + 1] == 0)

                    {

                        flowerbed[i] = 1;

                        count++;

                        i = i + 1;

                    }

                }

            }

​

            if (flowerbed[flowerbed.Length - 1] == 0

                && flowerbed[flowerbed.Length - 2] == 0

                && flowerbed[flowerbed.Length - 3] == 1)

            {

                count++;

            }

​

​

        }

​

        return n <= count;

    }

}