class Solution:
def moveZeroes(self, nums: List[int]) -> None:
"""
Do not return anything, modify nums in-place instead.
"""
l, r = 0, 0
while r < len(nums):
if nums[r] == 0:
r += 1
continue
nums[l] = nums[r]
l += 1
r += 1
while l < len(nums):
nums[l] = 0
l += 1