摘要：Description: Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two li 阅读全文

摘要：首先进入Python的官网：https://www.python.org/ 找到页面中的downloads 下载对应的版本，比如说本人用的是windows，64位就下载第一个，32位就下载第二个。 安装的时候一路点Next就行了。 安装完毕以后，还需要配置环境。 此电脑→右键属性→高级属性，弹出如下 阅读全文

摘要：Description: Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must 阅读全文

摘要：Description: Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurall 阅读全文