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[3/20] 605. Can Place Flowers

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You have a long flowerbed in which some of the plots are planted, and some are not. However, flowers cannot be planted in adjacent plots.

Given an integer array flowerbed containing 0's and 1's, where 0 means empty and 1 means not empty, and an integer n, return if n new flowers can be planted in the flowerbed without violating the no-adjacent-flowers rule.

 

Example 1:

Input: flowerbed = [1,0,0,0,1], n = 1
Output: true

Example 2:

Input: flowerbed = [1,0,0,0,1], n = 2
Output: false

 

Constraints:

  • 1 <= flowerbed.length <= 2 * 104
  • flowerbed[i] is 0 or 1
  • There are no two adjacent flowers in flowerbed.
0 <= n <= flowerbed.length
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학부유학생님의 댓글

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

        for idx in range(len(flowerbed)):
            if flowerbed[idx] == 0 and 
            (idx == 0 or flowerbed[idx-1] == 0) and 
            (idx == len(flowerbed)-1 or flowerbed[idx+1] == 0) and 
            n > 0:
                flowerbed[idx] = 1
                n -= 1
            
        
        
        return True if n == 0 else False

JJJJJJJJJJ님의 댓글

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class Solution:
    def canPlaceFlowers(self, flowerbed: List[int], n: int) -> bool:
        if n == 0: return True
        count = 0
        ln = len(flowerbed)
        for idx,val in enumerate(flowerbed):
            if val == 0 and (idx == 0 or flowerbed[idx-1] == 0) and (idx == ln-1 or flowerbed[idx+1 ]==0):
                count += 1
                flowerbed[idx] = 1
                if count == n:
                    return True
        return False
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