algorithm-pattern

# Algorithm Patterns

**English** | [中文](./README_zh.md)

![Let's grind LeetCode](https://cdn.jsdelivr.net/gh/greyireland/algorithm-pattern@master/images/title.png)

Algorithm patterns — the most scientific way to practice, the fastest path to an offer. Go from beginner to offer in one month. You deserve it 🐶~

As the name suggests, "algorithm patterns" are reusable templates for solving problems. Once you master them, grinding problems actually becomes fun~

> This project is a record of my own journey grinding LeetCode from scratch while job hunting. Through countless articles, columns, and videos, I distilled a set of problem-solving templates of my own.
>
> These templates mainly cover general-purpose patterns, along with common questions such as: how many problems should you actually solve, in what order, and how to practice more efficiently.

## Online Docs

Online docs on Gitbook: [Algorithm Patterns 🔥](https://greyireland.gitbook.io/algorithm-pattern/)

## Core Contents

### Getting Started 🐶

- [Intro to Go](./en/introduction/golang.md)
- [Algorithm Quickstart](./en/introduction/quickstart.md)

### Data Structures 🐰

- [Binary Tree](./en/data_structure/binary_tree.md)
- [Linked List](./en/data_structure/linked_list.md)
- [Stack and Queue](./en/data_structure/stack_queue.md)
- [Binary / Bit Manipulation](./en/data_structure/binary_op.md)

### Basic Algorithms 🐮

- [Binary Search](./en/basic_algorithm/binary_search.md)
- [Sorting Algorithms](./en/basic_algorithm/sort.md)
- [Dynamic Programming](./en/basic_algorithm/dp.md)

### Algorithmic Thinking 🦁

- [Recursion](./en/advanced_algorithm/recursion.md)
- [Sliding Window](./en/advanced_algorithm/slide_window.md)
- [Binary Search Tree](./en/advanced_algorithm/binary_search_tree.md)
- [Backtracking](./en/advanced_algorithm/backtrack.md)

## Reflections

Most articles introduce the thought process behind each problem along with analysis of common pitfalls. Having an idea isn't enough — you still need to write the code yourself, so every article ends with corresponding practice problems.

After finishing these practice problems, you'll have developed your own understanding of data structures and algorithms, and you'll be able to solve most interview questions. The big domestic companies (BAT, TMD) should no longer be a problem.

Starting my job search in April, I went from zero to grinding LeetCode, finishing 240 problems in about a month and a half (6 weeks).

![240 problems in a month and a half](https://cdn.jsdelivr.net/gh/greyireland/algorithm-pattern@master/images/leetcode_time.png)

![Practice record](https://cdn.jsdelivr.net/gh/greyireland/algorithm-pattern@master/images/leetcode_record.png)

When I first started, I really didn't know where to begin. Going in numeric order, I'd hit a hard problem after just a few and get stuck for a long time. Later I read the comments to see how others practiced and Googled the best approach, and discovered that practicing by topic is much more comfortab