摘要:Description Alice and Bob take turns playing a game, with Alice starting first. Initially, there is a number on the chalkboard. On each player's turn, 阅读全文
posted @ 2020-01-13 19:37 arcsinW 阅读 (12) 评论 (0) 编辑
摘要:Description Given a $m \times n$ grid filled with non negative numbers, find a path from top left to bottom right which minimizes the sum of all numbe 阅读全文
posted @ 2020-01-12 23:31 arcsinW 阅读 (7) 评论 (0) 编辑
摘要:Description A robot is located at the top left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or ri 阅读全文
posted @ 2020-01-12 14:45 arcsinW 阅读 (11) 评论 (0) 编辑
摘要:书上关于GCTimeRatio的讲解有点难以理解,查看Oracle的文档后重新理解了下 XX:GCTimeRatio 运行时间 / GC时间 当GCTimeRatio为19时,运行时间是GC时间的19倍,也就是GC时间不能超过 1 / (1 + 19) = 0.05 附上Oracle的文档原文 XX 阅读全文
posted @ 2019-12-03 15:48 arcsinW 阅读 (9) 评论 (0) 编辑
摘要:Description Given a binary matrix , we want to flip the image horizontally, then invert it, and return the resulting image. To flip an image horizonta 阅读全文
posted @ 2019-11-26 20:18 arcsinW 阅读 (12) 评论 (0) 编辑
摘要:Description Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Given linked list head = [4,5 阅读全文
posted @ 2019-11-26 12:25 arcsinW 阅读 (11) 评论 (0) 编辑
摘要:Description Given an array of integers , write a method that returns the "pivot" index of this array. We define the pivot index as the index where the 阅读全文
posted @ 2019-11-01 14:25 arcsinW 阅读 (23) 评论 (0) 编辑
摘要:传统的IDE安装之后都会在文件夹的右键菜单中增加如【Open in Visual Studio】或者【Open Folder as IntelliJ IDEA Project】这样的选项 但VS Code作为一个轻量级的Editor安装完毕之后并没有这个菜单,这里手动通过修改注册表来增加这个菜单 使 阅读全文
posted @ 2019-10-10 20:33 arcsinW 阅读 (325) 评论 (0) 编辑
摘要:使用apache代理生成的wss服务常出现 的问题,但多刷新几次页面就能连接成功 在官方文档没找到办法,最后在 "https://github.com/ratchetphp/Ratchet/issues/645" 找到了解决方案 这个不是Workerman的仓库,但解决办法是通用的 I could 阅读全文
posted @ 2019-10-10 17:56 arcsinW 阅读 (252) 评论 (0) 编辑
摘要:Android Studio是我学习Android开发路上的第一块绊脚石,新建一个项目,一行代码没动,直接编译不起来,我太难了,所以本文叫指北 本文讲解在9102年如何在国内网络不通畅的情况下流畅的使用Android Studio 1. 关闭代理 网上能搜索出一堆通过增加国内镜像站的代理来使下载SD 阅读全文
posted @ 2019-09-24 11:33 arcsinW 阅读 (818) 评论 (1) 编辑
摘要:Given a function which generates a uniform random integer in the range 1 to 7, write a function which generates a uniform random integer in the range 阅读全文
posted @ 2019-09-02 16:13 arcsinW 阅读 (30) 评论 (0) 编辑
摘要:Description e Tribonacci sequence Tn is defined as follows: T0 = 0, T1 = 1, T2 = 1, and Tn+3 = Tn + Tn+1 + Tn+2 for n = 0. Given , return the value of 阅读全文
posted @ 2019-08-28 18:20 arcsinW 阅读 (60) 评论 (0) 编辑
摘要:key value 通过key获取或设置value SET key value GET key : SET if not exists : +1 原子操作 给key设置过期时间 获取一个key的存活时间,每次set一个key的value,过期时间将会重置 已过期 永不过期 list 插入数据到lis 阅读全文
posted @ 2019-08-26 20:10 arcsinW 阅读 (26) 评论 (0) 编辑
摘要:Description Given a sorted (in ascending order) integer array of elements and a value, write a function to search in . If exists, then return its inde 阅读全文
posted @ 2019-08-21 13:39 arcsinW 阅读 (31) 评论 (0) 编辑
摘要:Description You are given a license key represented as a string S which consists only alphanumeric character and dashes. The string is separated into 阅读全文
posted @ 2019-08-09 19:10 arcsinW 阅读 (27) 评论 (0) 编辑