605. Can Place Flowers - Explanation

class Solution:
    def canPlaceFlowers(self, flowerbed: List[int], n: int) -> bool:
        f = [0] + flowerbed + [0]

        for i in range(1, len(f) - 1):
            if f[i - 1] == 0 and f[i] == 0 and f[i + 1] == 0:
                f[i] = 1
                n -= 1

        return n <= 0

class Solution:
    def canPlaceFlowers(self, flowerbed: List[int], n: int) -> bool:
        empty = 0 if flowerbed[0] else 1

        for f in flowerbed:
            if f:
                n -= int((empty - 1) / 2)
                empty = 0
            else:
                empty += 1

        n -= empty // 2
        return n <= 0