Leetcode 3191. Minimum Operations to Make Binary Array Elements Equal to One I

• Leetcode 3191. Minimum Operations to Make Binary Array Elements Equal to One I
  • 1. 解题思路
  • 2. 代码实现

• 题目链接：3191. Minimum Operations to Make Binary Array Elements Equal to One I

1. 解题思路

这一题的话没啥难度，按照题意从头到尾走一遍看一下一共翻转了几次即可。

2. 代码实现

给出python代码实现如下：

class Solution:
    def minOperations(self, nums: List[int]) -> int:
        n = len(nums)
        cnt = 0
        for i in range(n-2):
            if nums[i] == 1:
                continue
            for j in range(i, i+3):
                nums[j] = 1- nums[j]
            cnt += 1
        return cnt if sum(nums[-3:]) == 3 else -1

提交代码评测得到：耗时1075ms，占用内存20.3MB。