Think twice, code once.

摘要： 删除重复的电子邮箱 delete from Person where id not in (select id from (select min(id) as id from Person group by email) as temp) 好友申请 II ：谁有最多的好友 select id,cou 阅读全文

摘要： class Solution: def kSmallestPairs(self, nums1: List[int], nums2: List[int], k: int) -> List[List[int]]: if not nums1 or not nums2: return [] heap = [ 阅读全文