0605-can-place-flowers.py

class Solution:
    def canPlaceFlowers(self, flowerbed: List[int], n: int) -> bool:
       f = [0] + flowerbed + [0]
       
       for i in range(1, len(f) - 1):  # skip first & last
           if f[i - 1] == 0 and f[i] == 0 and f[i + 1] == 0:
               f[i] = 1
               n -= 1
       return n <= 0

       empty = 0 if flowerbed[0] else 1
       
       for f in flowerbed:
           if f:
               n -= int((empty - 1) / 2)  # int division, round toward zero
               empty = 0
           else:
               empty += 1

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