LeetCode Solutions

This repository contains my solutions to LeetCode problems, written in mostly C# with unit tests.
I use this repo to track my progress, strengthen problem-solving skills, and practice writing organized and tested code.

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Structure

LeetCodeSolutions/
    ├── 0001-TwoSum/
        ├── Solution.cs
    ├── 0002-AddTwoNumbers/
        ├── Solution.cs
README.md

• Problem folders → Named with LeetCode # and problem title
• Solution.cs → Each file includes:
  • Problem link and short description
  • My approach notes (why I solved it this way)
  • Implementation
  • MSTest unit tests

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How to Run

Clone the repo:

git clone https://github.com/KobenjiSan/LeetCode.git
cd LeetCode

Run tests with .NET:

dotnet test

Progress Tracker

Problem #	Title	Status	Date Completed	DS/A Category
0001	Two Sum	✅ Complete	08/27/2025	Hash Maps / Sets
0002	Add Two Numbers	✅ Complete	08/28/2025	Linked Lists
0009	Palindrome Number	✅ Complete	08/29/2025	Arrays & Strings
0283	Move Zeroes	✅ Complete	08/30/2025	Arrays & Strings
0242	Valid Anagram	✅ Complete	08/31/2025	Hash Maps / Sets
0020	Valid Parentheses	✅ Complete	09/01/2025	Stacks & Queues
0206	Reverse Linked List	✅ Complete	09/02/2025	Linked Lists
0104	Maximum Depth of Binary Tree	✅ Complete	09/03/2025	Trees & Graphs
0703	Kth Largest Element in a Stream	✅ Complete	09/04/2025	Heaps / Priority Queue
0070	Climbing Stairs	⏳ In Progress	MM/DD/YYYY	Dynamic Programming
1971	Find if Path Exists in Graph	❌ Not Started	MM/DD/YYYY	Union-Find (Graph)
0121	Best Time to Buy and Sell Stock	❌ Not Started	MM/DD/YYYY	Arrays & Strings
0349	Intersection of Two Arrays	❌ Not Started	MM/DD/YYYY	Hash Maps / Sets
0155	Min Stack	❌ Not Started	MM/DD/YYYY	Stacks & Queues
0141	Linked List Cycle	❌ Not Started	MM/DD/YYYY	Linked Lists
0101	Symmetric Tree	❌ Not Started	MM/DD/YYYY	Trees & Graphs
0215	Kth Largest Element in an Array	❌ Not Started	MM/DD/YYYY	Heaps / Priority Queue
0198	House Robber	❌ Not Started	MM/DD/YYYY	Dynamic Programming
0200	Number of Islands	❌ Not Started	MM/DD/YYYY	Union-Find (Graph)

Goals

• Attempt one problem a day
• Improve at writing unit tests
• Improve DS&A logical thinking
• Better understand complexities
• Better articulate my thought processes