原地移动零元

# 给定一个数组 nums，编写一个函数将所有 0 移动到数组的末尾，同时保持非零元素的相对顺序。
# 请注意 ，必须在不复制数组的情况下原地对数组进行操作。

# 示例 1:
# 输入: nums = [0,1,0,3,12]
# 输出: [1,3,12,0,0]

# 示例 2:
# 输入: nums = [0]
# 输出: [0]


from typing import List


class Solution:
    def moveZeroes(self, nums: List[int]) -> None:
        """
        Do not return anything, modify nums in-place instead.
        """
        n = len(nums)
        left = right = 0

        while right < n:
            if nums[right] != 0:
                nums[left], nums[right] = nums[right], nums[left]
                left += 1
            right +=1


# class Solution:
#     def moveZeroes(self, nums: List[int]) -> List[int]:
#         n = len(nums)
#         left = right = 0

#         while right < n:
#             if nums[right] != 0:
#                 nums[left], nums[right] = nums[right], nums[left]
#                 left += 1
#             right += 1
#         return nums


# if __name__ == "__main__":
#     solution = Solution()
#     nums = [0, 1, 0, 3, 12]
#     res = solution.moveZeroes(nums)
#     print(res)