摘要： 题目如下： Given a binary tree, flatten it to a linked list in-place. For example, given the following tree: The flattened tree should look like: 解题思路：递归，从 阅读全文

摘要： 题目如下： Implement a basic calculator to evaluate a simple expression string. The expression string contains only non-negativeintegers, +, -, *, / operat 阅读全文

摘要： 题目如下： Given an array which consists of non-negative integers and an integer m, you can split the array into m non-empty continuous subarrays. Write an 阅读全文