Commit 7813855

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add 80 & 81

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Original file line number	Diff line number	Diff line change
`@@ -690,6 +690,23 @@ class Solution:`
`690`	`690`	`from itertools import combinations`
`691`	`691`	`return sum([list(combinations(nums, i)) for i in range(len(nums) + 1)], [])`
`692`	`692`	```
	`693`	`+`
	`694`	`+## [80. 删除排序数组中的重复项 II 4行](https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array-ii/)`
	`695`	+```python
	`696`	`+def removeDuplicates(nums: [int]) -> int:`
	`697`	`+ for i in range(len(nums)-3, -1, -1):`
	`698`	`+ if nums[i] == nums[i+1] and nums[i] == nums[i+2]:`
	`699`	`+ nums.pop(i)`
	`700`	`+ return len(nums)`
	`701`	+```
	`702`	`+- 从尾部开始考虑`
	`703`	`+`
	`704`	`+## [81. 搜索旋转排序数组 II 1行](https://leetcode-cn.com/problems/search-in-rotated-sorted-array-ii/)`
	`705`	+```python
	`706`	`+def search(nums: [int], target: int) -> bool:`
	`707`	`+ return target in nums`
	`708`	+```
	`709`	`+`
`693`	`710`	`## [83. Remove Duplicates from Sorted List 3行](https://leetcode.com/problems/remove-duplicates-from-sorted-list/)`
`694`	`711`	```python
`695`	`712`	`# Definition for singly-linked list.`

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