不会跑 - work for life

10 Jun 2017

克隆一个图，用了两个遍历方法如下： Clone an undirected graph. Each node in the graph contains a label and a list of its neighbors. OJ’s ...

07 Jun 2017

Given a binary tree, return the level order traversal of its nodes’ values. (ie, from left to right, level by level). Fo...

06 Jun 2017

Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the ...

06 Jun 2017

序列化和反序列化一个二叉搜索树，题目的意思是想让我利用搜索树的性质来做，但是我还是坚持了使用按层和先序遍历的方法，仅供参考，原题如下： Serialization is the process of converting a data st...

06 Jun 2017

Given a root node reference of a BST and a key, delete the node with the given key in the BST. Return the root node refe...

04 Jun 2017

Given a non-empty array of integers, return the k most frequent elements. For example, Given [1,1,1,2,2,3] and k = 2, re...

03 Jun 2017

比较有意思的题，求最少穿过的砖的块数，原题连接：https://leetcode.com/problems/brick-wall/ There is a brick wall in front of you. The wall is re...

03 Jun 2017

这是一个面试的经典题，明显是个送分题：） Given a string, find the length of the longest substring without repeating characters. Examples: Gi...

02 Jun 2017

Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. # _*_ codi...

01 Jun 2017

Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the origina...