摘要：
Given a singly linked list L with integer keys, you are supposed to remove the nodes with duplicated absolute values of the keys. That is, for each va 阅读全文
摘要：
Among all the factors of a positive integer N, there may exist several consecutive numbers. For example, 630 can be factored as 3 5 6 7, where 5, 6, a 阅读全文