def a(nums):
left = len(nums)-1
right = len(nums)-1
while right >= 0:
if nums[right] != 0:
temp = nums[right]
nums[right] = nums[left]
nums[left] = temp
left -= 1
right -= 1
return nums
nums = [0,0,1,2,0,3]
print(a(nums))
ZGVmIGEobnVtcyk6CglsZWZ0ID0gbGVuKG51bXMpLTEKCXJpZ2h0ID0gbGVuKG51bXMpLTEKCXdoaWxlIHJpZ2h0ID49IDA6CgkJaWYgbnVtc1tyaWdodF0gIT0gMDoKCQkJdGVtcCA9IG51bXNbcmlnaHRdCgkJCW51bXNbcmlnaHRdID0gbnVtc1tsZWZ0XQoJCQludW1zW2xlZnRdID0gdGVtcAoJCQlsZWZ0IC09IDEKCQlyaWdodCAtPSAxCglyZXR1cm4gbnVtcwpudW1zID0gWzAsMCwxLDIsMCwzXQpwcmludChhKG51bXMpKQ==