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`@@ -2412,6 +2412,21 @@ class Solution:`
`2412`	`2412`	`def kClosest(self, points: List[List[int]], K: int) -> List[List[int]]:`
`2413`	`2413`	`return sorted(points, key=lambda x: x[0]2 + x[1]2)[:K]`
`2414`	`2414`	```
	`2415`	`+## [1290. Convert Binary Number in a Linked List to Integer](https://leetcode.com/problems/convert-binary-number-in-a-linked-list-to-integer/)`
	`2416`	+```python
	`2417`	`+# Definition for singly-linked list.`
	`2418`	`+# class ListNode:`
	`2419`	`+# def __init__(self, x):`
	`2420`	`+# self.val = x`
	`2421`	`+# self.next = None`
	`2422`	`+`
	`2423`	`+class Solution:`
	`2424`	`+ def getDecimalValue(self, head: ListNode) -> int:`
	`2425`	`+ r = 0`
	`2426`	`+ while head: r, head = r << 1 \| head.val, head.next`
	`2427`	`+ return r`
	`2428`	+```
	`2429`	`+- O(N), 位运算`
`2415`	`2430`	`# 专题探索`
`2416`	`2431`	`![](思维导图.jpg)`
`2417`	`2432`

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