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‎README.md‎

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# 极客大学「算法训练营第四期 - 1 班」作业提交仓库
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请大家通过该链接查看讲师课件并进行下载: https://pan.baidu.com/s/1k1BHhltBkZLJw0TG-uYC7g 密码:p5op
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## 仓库目录结构说明
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‎Utils/.idea/Utils.iml‎

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‎Utils/.idea/misc.xml‎

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‎Utils/.idea/modules.xml‎

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‎Utils/.idea/vcs.xml‎

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‎Utils/.idea/workspace.xml‎

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‎Utils/git_quick_guide.md‎

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Environment Setup
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-----------------
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### Git Download
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```
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Download Git according to Windows, Linux, Mac
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```
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### Git global setup
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```
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git config --global user.name "Your Name"
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git config --global user.email "youremail@xxx"
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```
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### Add public key
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* Add your public key
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Note: [Here](https://help.github.com/enterprise/2.15/user/articles/connecting-to-github-with-ssh) is the document about how to add the ssh key.
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Workflow with git
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-----------------
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### Prepare
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* Open (https://github.com/algorithm004-01/algorithm004-01) in your browser, and click "Fork", choose your own namespace.
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* Clone repo:
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```
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git clone https://github.com/your_namespace/algorithm004-01.git
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or
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git clone git@github.com:your_namespace/algorithm004-01.git
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```
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### Before developing a new homework
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1. Choose the base branch on group fork
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```
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git checkout master
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```
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2. Write your own code
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### After developing
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1. Commit your changes in local repo.
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```
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git add /path/to/files/you/changed
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git commit -m 'XXX submit xx homework code'
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```
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### Merge your changes to `algorithm004-01/algorithm004-01`
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1. Push local commits to `your_namespace/algorithm004-01:mastr` in GitHub:
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```
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git push origin master
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```
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2. Create pull request from XXX to `algorithm004-01/algorithm004-01:master`
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![step1](https://github.com/honeyaya/algorithm004-01/blob/master/Utils/pr1.png)
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![step2](https://github.com/honeyaya/algorithm004-01/blob/master/Utils/pr2.png)
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Appendix
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--------
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More Git Tutorial:
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- https://www.liaoxuefeng.com/wiki/896043488029600
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- 极客时间的git课程
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‎Utils/pr1.png‎

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‎Utils/pr2.png‎

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‎Week 01/id_006/DequeDemo.java‎

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package com.mrglint.leetcode;
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import java.util.Deque;
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import java.util.LinkedList;
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/**
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* @author luhuancheng
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* @since 2019-10-20 10:34
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*/
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public class DequeDemo {
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public static void main(String[] args) {
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// 一个使用链表实现的无界双端队列
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Deque<String> deque = new LinkedList<>();
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// 从头部入队
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deque.addFirst("a");
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deque.addFirst("b");
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deque.addFirst("c");
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System.out.println(deque);
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// 从尾部入队
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deque.addLast("a");
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deque.addLast("b");
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deque.addLast("c");
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System.out.println(deque);
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String str = deque.peek();
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System.out.println(str);
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System.out.println(deque);
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while (deque.size() > 0) {
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// 从头部出队
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System.out.println(deque.removeFirst());
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}
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System.out.println(deque);
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}
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}
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