Problem

In a Meta Reels client buffer, 0 represents an empty placeholder frame. Given an integer array nums, move all zeroes to the end in-place while keeping the relative order of the non-zero elements.

Return the modified array after the transformation.

Formal Specification

• Input: nums, a list of integers
• Output: The same list with all non-zero values kept in original order, followed by all zeroes
• Requirement: Solve it in-place without creating another array for the final result

Examples

Example 1

Input: nums = [0, 1, 0, 3, 12]
Output: [1, 3, 12, 0, 0]

Explanation: The non-zero values 1, 3, 12 stay in the same order, and both zeroes move to the end.

Example 2

Input: nums = [0, 0, 1]
Output: [1, 0, 0]

Explanation: Only one non-zero value exists, so it moves to the front and the remaining positions become zero.

Constraints

• 1 <= len(nums) <= 10^5
• -2^31 <= nums[i] <= 2^31 - 1
• Modify the array in-place
• Preserve the relative order of non-zero elements