605. 种花问题

 

 

代码一：

class Solution(object):
    def canPlaceFlowers(self, flowerbed, n):
        """
        :type flowerbed: List[int]
        :type n: int
        :rtype: bool
        """
        if len(flowerbed) == 1 and flowerbed[0] == 0:
            flowerbed[0] = 1
            n -= 1
            return n <= 0
        if flowerbed[0] == 0 and flowerbed[1] == 0:
            flowerbed[0] = 1
            n -= 1
        for i in range(1, len(flowerbed) - 1):
            if n <= 0:
                return True
            if flowerbed[i - 1] == 0 and flowerbed[i] == 0 and flowerbed[i + 1] == 0:
                flowerbed[i] = 1
                n -= 1
        if flowerbed[-1] == 0 and flowerbed[-2] == 0:
            flowerbed[-1] = 1
            n -= 1
        return n <= 0

代码二：

class Solution(object):
    def canPlaceFlowers(self, flowerbed, n):
        """
        :type flowerbed: List[int]
        :type n: int
        :rtype: bool
        """
        flowerbed = [0] + flowerbed + [0]
        for i in range(1, len(flowerbed)-1):
            if n <= 0:
                return True
            if flowerbed[i - 1] == 0 and flowerbed[i] == 0 and flowerbed[i + 1] == 0:
                flowerbed[i] = 1
                n -= 1
        return n <= 0