514. 自由之路 视频游戏"辐射4"中,任务"通向自由"要求玩家到达名为"Freedom Trail Ring"的金属表盘,并使用表盘拼写特定关键词才能开门. 给定一个字符串 ring,表示刻在外环上的编码:给定另一个字符串 key,表示需要拼写的关键词.您需要算出能够拼写关键词中所有字符的最少步数. 最初,ring 的第一个字符与12:00方向对齐.您需要顺时针或逆时针旋转 ring 以使 key 的一个字符在 12:00 方向对齐,然后按下…

自由之路 视频游戏"辐射4"中,任务"通向自由"要求玩家到达名为"Freedom Trail Ring"的金属表盘,并使用表盘拼写特定关键词才能开门. 给定一个字符串 ring,表示刻在外环上的编码:给定另一个字符串 key,表示需要拼写的关键词.您需要算出能够拼写关键词中所有字符的最少步数. 最初,ring 的第一个字符与12:00方向对齐.您需要顺时针或逆时针旋转 ring 以使 key 的一个字符在 12:00 方向对齐,然后按下中心按钮,…

In the video game Fallout 4, the quest "Road to Freedom" requires players to reach a metal dial called the "Freedom Trail Ring", and use the dial to spell a specific keyword in order to open the door. Given a string ring, which represe…

Given a collection of numbers that might contain duplicates, return all possible unique permutations. For example, [1,1,2] have the following unique permutations: [1,1,2], [1,2,1], and [2,1,1]. 解题思路一: 发现Java for LeetCode 046 Permutations自己想多了,代码直接拿来用…

I/O基础入门 Java的I/O演进 第一章 Java的I/O演进之路 1.1 I/O基础入门 1.1.1 Linux网络I/O模型简介 根据UNIX网络编程对I/O模型的分类,UNIX提供了5中I/O模型,分别如下. (1)阻塞I/O模型: (2)非阻塞I/O模型: (3)I/O复用模型: (4)信号驱动I/O模型: (5)异步I/O: 1.1.2 I/O多路复用技术 I/O多路复用的主要应用场景: 服务器需要同时处理多个处于监听状态或者多个连接状态的套接字: 服务器需要同时处理多种网络协议的…

Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 can be used and each combination should be a unique set of numbers. Ensure that numbers within the set are sorted in ascending order. Example 1…

Given a string S, you are allowed to convert it to a palindrome by adding characters in front of it. Find and return the shortest palindrome you can find by performing this transformation. For example: Given "aacecaaa", return "aaacecaaa&qu…

Given a 2D board and a list of words from the dictionary, find all words in the board. Each word must be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or vertically neighboring. The same le…

Design a data structure that supports the following two operations: void addWord(word)bool search(word) search(word) can search a literal word or a regular expression string containing only letters a-z or .. A . means it can represent any one letter.…

There are a total of n courses you have to take, labeled from 0 to n - 1. Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed as a pair: [0,1] Given the total number of courses and a l…