🧠 LeetCode Practice by CarGDev
This repo tracks my journey solving LeetCode problems — not just code, but my thought process, reflections, and patterns I'm mastering.
✅ Progress
- Total Problems Solved: 75+
- Notes Written: 1+ (expanding soon)
- Categories Covered: Arrays, Hash Maps, Dynamic Programming, Two Pointers, Binary Search, etc.
🗂 Directory Structure
src/exercises/: Auto-downloaded solutions via Cursorsrc/notes/: My personal notes, approaches, and learning reflections
🧩 Problem Index
| # | Title | Difficulty | Notes |
|---|---|---|---|
| 001 | Two Sum | Easy | View Notes |
| 002 | Add Two Numbers | Medium | View Notes |
| 003 | Longest Substring Without Repeating Characters | Medium | View Notes |
| 004 | Median of Two Sorted Arrays | Hard | View Notes |
| 005 | Longest Palindromic Substring | Medium | View Notes |
| 006 | Zigzag Conversion | Medium | View Notes |
| 007 | Reverse Integer | Medium | View Notes |
| 009 | Palindrome Number | Easy | View Notes |
| 010 | Regular Expression Matching | Hard | View Notes |
| 011 | Container With Most Water | Medium | View Notes |
| 013 | Roman to Integer | Easy | View Notes |
| 014 | Longest Common Prefix | Easy | View Notes |
| 015 | 3Sum | Medium | View Notes |
| 020 | Valid Parentheses | Easy | View Notes |
| 021 | Merge Two Sorted Lists | Easy | View Notes |
| 022 | Generate Parentheses | Medium | View Notes |
| 028 | Find the Index of the First Occurrence in a String | Easy | View Notes |
| 035 | Search Insert Position | Easy | View Notes |
| 036 | Valid Sudoku | Medium | View Notes |
| 042 | Trapping Rain Water | Hard | View Notes |
| 045 | Jump Game II | Medium | View Notes |
| 050 | Pow(x, n) | Medium | View Notes |
| 055 | Jump Game | Medium | View Notes |
| 066 | Plus One | Easy | View Notes |
| 069 | Sqrt(x) | Easy | View Notes |
| 074 | Search a 2D Matrix | Medium | View Notes |
| 080 | Remove Duplicates from Sorted Array II | Medium | View Notes |
| 088 | Merge Sorted Array | Easy | View Notes |
| 089 | Gray Code | Medium | View Notes |
| 090 | Subsets II | Medium | View Notes |
| 091 | Decode Ways | Medium | View Notes |
| 092 | Reverse Linked List II | Medium | View Notes |
| 121 | Best Time to Buy and Sell Stock | Easy | View Notes |
| 122 | Best Time to Buy and Sell Stock II | Medium | View Notes |
| 125 | Valid Palindrome | Easy | View Notes |
| 128 | Longest Consecutive Sequence | Medium | View Notes |
| 135 | Candy | Hard | View Notes |
| 141 | Linked List Cycle | Easy | View Notes |
| 149 | Max Points on a Line | Hard | View Notes |
| 150 | Evaluate Reverse Polish Notation | Medium | View Notes |
| 153 | Find Minimum in Rotated Sorted Array | Medium | View Notes |
| 155 | Min Stack | Medium | View Notes |
| 167 | Two Sum II - Input Array Is Sorted | Medium | View Notes |
| 169 | Majority Element | Easy | View Notes |
| 172 | Factorial Trailing Zeroes | Medium | View Notes |
| 189 | Rotate Array | Medium | View Notes |
| 202 | Happy Number | Easy | View Notes |
| 205 | Isomorphic Strings | Easy | View Notes |
| 206 | Reverse Linked List | Easy | View Notes |
| 217 | Contains Duplicate | Easy | View Notes |
| 219 | Contains Duplicate II | Easy | View Notes |
| 228 | Summary Ranges | Easy | View Notes |
| 238 | Product of Array Except Self | Medium | View Notes |
| 242 | Valid Anagram | Easy | View Notes |
| 243 | Shortest Word Distance | Easy | View Notes |
| 244 | Shortest Word Distance II | Medium | View Notes |
| 245 | Shortest Word Distance III | Medium | View Notes |
| 246 | Strobogrammatic Number | Easy | View Notes |
| 248 | Strobogrammatic Number III | Hard | View Notes |
| 290 | Word Pattern | Easy | View Notes |
| 383 | Ransom Note | Easy | View Notes |
| 392 | Is Subsequence | Easy | View Notes |
| 704 | Binary Search | Easy | View Notes |
| 875 | Koko Eating Bananas | Medium | View Notes |
| 990 | Satisfiability of Equality Equations | Medium | View Notes |
| 1200 | Minimum Absolute Difference | Easy | View Notes |
| 1298 | Maximum Candies You Can Get from Boxes | Medium | View Notes |
| 1820 | Maximum Number of Accepted Invitations | Medium | View Notes |
| 2040 | Kth Smallest Product of Two Sorted Arrays | Medium | View Notes |
| 2053 | Kth Distinct String in an Array | Easy | View Notes |
| 2116 | Check if a Parentheses String Can Be Valid | Medium | View Notes |
| 2294 | Partition Array Such That Maximum Difference Is K | Medium | View Notes |
| 2441 | Largest Positive Integer That Exists With Its Negative | Easy | View Notes |
| 2616 | Minimize the Maximum Difference of Pairs | Medium | View Notes |
| 2966 | Divide Array Into Arrays With Max Difference | Medium | View Notes |
| 3442 | Maximum Difference Between Even and Odd Frequency I | Easy | View Notes |
| 3445 | Maximum Difference Between Even and Odd Frequency II | Easy | View Notes |
🛠️ Tools & Scripts
create_missing_notes.sh: Automatically creates missing note files for solved problems
📚 Resources
This repository is a living document of my algorithmic learning journey. Each note captures my thought process, mistakes, and insights.