LEETCODE80. 删除排序数组中的重复项

俺的:

class Solution:
    def removeDuplicates(self, nums: List[int]) -> int:
        if(len(nums)==0):
            return 0
        i=0
        while i<len(nums):
            s=i
            while i<len(nums) and nums[i]==nums[s]:
                i+=1
            if i-s>2:
                for j in range(s+2,i):
                    nums[j]='x'
        i=0
        while i<len(nums):
            if nums[i]=='x':
                del nums[i]
                i-=1
            i+=1
        return len(nums)

评论区的:
思路:i是新数组末尾,若e不等于nums[i-1]表示当前e应该写到新数组里,或者i<1时也肯定要写到新数组里。

class Solution:
    def removeDuplicates(self, nums: List[int]) -> int:
        i=0
        for e in nums:
            if i<1 or nums[i-1]!=e:
                nums[i]=e
                i+=1        
        return i
posted @ 2019-07-02 18:22  NeoZy  阅读(70)  评论(0编辑  收藏  举报