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#! /usr/bin/env python

# -*- coding: utf-8 -*-

class Solution(object):

def removeDuplicates(self, nums):

"""

:type nums: List[int]

:rtype: int

"""

if not nums:

return 0

removed_end = 0

for i in range(1, len(nums)):

if nums[i] != nums[removed_end]:

removed_end += 1

nums[removed_end] = nums[i]

return removed_end + 1

"""

[]

[1,1,2,2,3]

[1,3,5,8,9,9,9]

"""