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1.题目描述
Given a sorted array, remove the duplicates in-placesuch that each element appear only once and return the new length.
Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory.
Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory.
给出一串数字，返回出去重复元素后的序列长度
2.题目分析
比较相邻数字，出现相同数字原列表长度减一
3.解题思路
1 class Solution(object): 2 def removeDuplicates(self, nums): 3 """ 4 :type nums: List[int] 5 :rtype: int 6 """ 7 len_nums=len(nums) 8 i=0 9 if len_nums==0: #排除空列表 10 return None 11 if len_nums==1: #考虑列表长度为一的情况 12 return 1 13 while i<len(nums)-1: 14 if nums[i]==nums[i+1]: #检查相邻元素是否相同 15 len_nums-=1 16 i+=1 17 return len_nums
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