2025-08-02 09:36:15 +0000 UTC

class Solution:
    def duplicateZeros(self, arr: List[int]) -> None:
        """
        Do not return anything, modify arr in-place instead.
        """
        queue = deque()
        for i in range(len(arr)):
            num = arr[i]
            if queue:
                arr[i] = queue.popleft()
                queue.append(num)
            if num == 0:
                queue.append(0)