Data Structures and Algorithms Learning Journey

This is my personal repository where I document my journey learning Data Structures and Algorithms using JavaScript. I use this space to track my progress, store my solutions to various LeetCode problems, and document my understanding of different problem-solving patterns and techniques.

Repository Structure

leetcode-problems/
├── 150-dsa-interview/     # LeetCode Top 150 Interview Questions
├── arrays/
│   └── two-pointer/      # Two Pointer Technique Problems
│       └── easy/         # Easy Level Problems

LeetCode Solutions

Top 150 Interview Questions

#	Problem	Difficulty	Solution	Topics
1	Two Sum	Easy	Solution	Array, Hash Table
53	Maximum Subarray	Medium	Solution	Array, Dynamic Programming
121	Best Time to Buy and Sell Stock	Easy	Solution	Array, Dynamic Programming
238	Product of Array Except Self	Medium	Solution	Array
33	Search in Rotated Sorted Array	Medium	Solution	Array, Binary Search

Array Problems

Two Pointer Technique

#	Problem	Difficulty	Solution	Topics
26	Remove Duplicates from Sorted Array	Easy	Solution	Array, Two Pointers
27	Remove Element	Easy	Solution	Array, Two Pointers
283	Move Zeroes	Easy	Solution	Array, In-place
169	Majority Element	Easy	Solution	Array, Voting
189	Rotate Array	Medium	Solution	Array, In-place
122	Best Time to Buy and Sell Stock II	Medium	Solution	Array, Greedy

Topics Covered

• Arrays
  • Two Pointer Technique
  • Hash Table
• Dynamic Programming
• Problem-Solving Patterns
  • In-place Array Modifications
  • Sliding Window
  • Hash Map Usage

Learning Resources

• LeetCode
• Top 150 Interview Questions

How to Use This Repository

1. Each solution file contains:

   • Problem description in comments
   • Example test cases
   • Well-documented solution with explanations

2. To run any solution:

   node [path-to-solution-file]

My Learning Progress

This repository serves as a personal documentation of my DSA learning journey. I regularly update it with:

• New problem solutions as I solve them
• Improved solutions when I learn better approaches
• Notes about different problem-solving patterns
• Implementation techniques I've learned

Note: This is a personal learning repository to showcase my progress and understanding of DSA concepts. While the solutions here work, there might be more optimal approaches as I continue to learn and improve.