Archive

2026  23

March  10

How to check if a string is a Valid Palindrome: O(n) two pointer solution explained

March 17, 2026 · 3 min · 509 words · Hitesh Patel

How to check Valid Parentheses: O(n) Stack solution explained

March 16, 2026 · 2 min · 266 words · Hitesh Patel

How to Group Anagrams: O(n · m log m) Solution Explained

March 13, 2026 · 3 min · 436 words · Hitesh Patel

How to find if string is Valid Anagram: O(n) solution explained

March 12, 2026 · 2 min · 325 words · Hitesh Patel

Minimum Window Substring: Sliding Window Explained

March 11, 2026 · 3 min · 504 words · Hitesh Patel

Longest Repeating Character Replacement: Sliding Window Explained

March 10, 2026 · 3 min · 563 words · Hitesh Patel

Longest Substring Without Repeating Characters: Sliding Window Explained

March 9, 2026 · 3 min · 637 words · Hitesh Patel

Remove Nth Node from the End of the Linked List (Blind 75)

March 6, 2026 · 2 min · 355 words · Hitesh Patel

Merge two sorted linked list (Blind 75)

March 4, 2026 · 2 min · 314 words · Hitesh Patel

How to Detect a Cycle in a Linked List (Blind 75)

March 2, 2026 · 3 min · 427 words · Hitesh Patel

February  10

How to Reverse a Linked List (Blind 75)

February 28, 2026 · 3 min · 528 words · Hitesh Patel

Word Search (Blind 75): DFS + Backtracking Explained

February 26, 2026 · 4 min · 667 words · Hitesh Patel

Rotate Image (Blind 75): 90° Matrix Rotation Explained

February 24, 2026 · 2 min · 347 words · Hitesh Patel

Spiral Matrix (Blind 75): Matrix traversal in spiral order

February 22, 2026 · 2 min · 404 words · Hitesh Patel

Set Matrix Zeroes (Blind 75): O(1) Space Solution

February 20, 2026 · 4 min · 749 words · Hitesh Patel

Find the container with most water (Blind 75) — O(n) Solution

February 17, 2026 · 2 min · 386 words · Hitesh Patel

Three Sum (Blind 75) — O(n²) Solution

February 15, 2026 · 4 min · 648 words · Hitesh Patel

Search in Rotated Sorted Array (Blind 75) — O(log n) Solution

February 13, 2026 · 3 min · 437 words · Hitesh Patel

Blind 75: Find Minimum in Rotated Sorted Array — Understanding Binary Search Deeper

February 11, 2026 · 2 min · 342 words · Hitesh Patel

Blind 75: Best Time to Buy and Sell Stock — One Pass Solution Explained

February 6, 2026 · 3 min · 611 words · Hitesh Patel

January  3

Blind 75: Two Sum — From Brute Force to Hash Map

January 26, 2026 · 3 min · 493 words · Hitesh Patel

Stop Nesting If Statements. Use Guard Clauses

January 26, 2026 · 2 min · 247 words · Hitesh Patel

9 Dart Syntactic Sugar Features That Make My Codebase Happier

January 15, 2026 · 3 min · 523 words · Hitesh Patel

2025  4

October  2

Queues — The Backbone of Modern Architecture

October 23, 2025 · 3 min · 462 words · Hitesh Patel

Securely Accessing Private RDS Databases Using SSH Tunneling and a Bastion Host

October 5, 2025 · 3 min · 543 words · Hitesh Patel

August  1

How We Streamlined Support Replies Using LLMs and RAG

August 5, 2025 · 3 min · 625 words · Hitesh Patel

July  1

How did I host my own blog Ghost CMS + AWS

July 6, 2025 · 3 min · 548 words · Hitesh Patel

2024  1

July  1

Android’s Shift to 16Kb Page Size - What It Means for Developers

July 22, 2024 · 2 min · 423 words · Hitesh Patel