huhuixinxing的博客

Given an array of integers, return indices of the two numbers such that they add up to a specific target.You may assume that each input would have exactly one solution, and you may not use the same ele

A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.Return a deep copy of the list.本题出现了一个新的链表结点结构，结点有两个指针域，一个指向下一个结点，一个指向