Leetcode

Showcasing my solutions to Leetcode problems in Python alongside my thought process and approach to solving them.

Medium

Feb 20, 2026

Leetcode

1448. Count Good Nodes in Binary Tree

199. Binary Tree Right Side View

337. House Robber III

102. Binary Tree Level Order Traversal

23. Merge k Sorted Lists

146. LRU Cache

138. Copy List with Random Pointer

443. String Compression

334. Increasing Triplet Subsequence

1768. Merge Strings Alternately

Infinite Taxi Driver

1730. Shortest Path To Get Food

1642. Furthest Building You Can Reach

752. Open the Lock

Skyscraper Furthest Distance

Rummy Card Game

Minimum Lock Turns

Max Level Party Invites

235. Lowest Common Ancestor of a Binary Search Tree

572. Subtree of Another Tree

100. Same Tree

110. Balanced Binary Tree

239. Sliding Window Maximum

42. Trapping Rain Water

287. Find the Duplicate Number

2. Add Two Numbers

19. Remove Nth Node From End of List

543. Diameter of Binary Tree

104. Maximum Depth of Binary Tree

226. Invert Binary Tree

143. Reorder List

141. Linked List Cycle

21. Merge Two Sorted Lists

206. Reverse Linked List

76. Minimum Window Substring

567. Permutation in String

424. Longest Repeating Character Replacement

3. Longest Substring Without Repeating Characters

121. Best Time to Buy and Sell Stock

33. Search in Rotated Sorted Array

153. Find Minimum in Rotated Sorted Array

875. Koko Eating Bananas

74. Search a 2D Matrix

704. Binary Search

84. Largest Rectangle in Histogram

853. Car Fleet

739. Daily Temperatures

22. Generate Parentheses

150. Evaluate Reverse Polish Notation

155. Min Stack

20. Valid Parentheses

11. Container With Most Water

15. 3Sum

167. Two Sum II - Input Array Is Sorted

125. Valid Palindrome

128. Longest Consecutive Sequence

36. Valid Sudoku

238. Product of Array Except Self

347. Top K Frequent Elements

49. Group Anagrams

242. Valid Anagram

217. Contains Duplicate

1. Two Sum