摘要：
转载自：http://soft.chinabyte.com/database/248/12193748.shtml《C专家编程》第3章学习 C语言中的声明是一个比较令人头痛的问题，尤其一些复杂的声明看起来甚至会令人感到恐怖，如果您是一位初学者，您一定会对下面这几个式子感到畏惧。因为对于刚接触这种形... 阅读全文
摘要：
想用scikit-learn学机器学习，昨天安装了一下，今天整理出来。有两种方法使用这个包。一、简单粗暴，直接下载winPython，装了就可以用，IDE是自带的Spyder。二、1、首先安装python，配置环境变量等，这个不多说。 2、安装pip： https://bootstrap.pypa... 阅读全文
摘要：
Description:Count the number of prime numbers less than a non-negative number,n.传送门：https://leetcode.com/problems/count-primes/尽可能把查找次数缩小，直接用双重for会超时。... 阅读全文
摘要：
There are a total ofncourses you have to take, labeled from0ton - 1.Some courses may have prerequisites, for example to take course 0 you have to firs... 阅读全文
摘要：
Given a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, then right to left for the next level and al... 阅读全文
摘要：
Implementatoito convert a string to an integer.Hint:Carefully consider all possible input cases. If you want a challenge, please do not see below and ... 阅读全文
摘要：
Given a 2d grid map of'1's (land) and'0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent ... 阅读全文
摘要：
Given a binary tree, imagine yourself standing on therightside of it, return the values of the nodes you can see ordered from top to bottom.For exampl... 阅读全文
摘要：
Given a binary tree, return thebottom-up level ordertraversal of its nodes' values. (ie, from left to right, level by level from leaf to root).For exa... 阅读全文
摘要：
Given a binary tree, return thelevel ordertraversal of its nodes' values. (ie, from left to right, level by level).For example:Given binary tree{3,9,2... 阅读全文