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Rulcode Blogs
Explore algorithms, coding tips, and system design guides
Interview Prep
Master the Blind 75: The Only LeetCode List You Need for FAANG Interviews
Discover why the Blind 75 is the most efficient path to mastering coding interviews at Google, Meta, Amazon, and other top tech companies. Learn proven patterns through interactive visualizations that make complex algorithms click instantly.
Jan 15, 2025
18 min read
System Design & Data Structures
LRU Cache — The Complete Guide to the Most Popular Cache Algorithm
A 4,000-word deep dive into LRU Cache: understand how caching works, why LRU is the backbone of performance optimization, and how to implement it efficiently using HashMaps and Doubly Linked Lists in multiple languages.
Feb 14, 2025
35 min read
Algorithms
Dynamic Programming for People Who Hate Dynamic Programming
A beginner-friendly, visually driven guide to Dynamic Programming (DP). Learn why DP feels hard, how to identify DP problems instantly, and how animations on Rulcode.com make them simple to understand.
Jan 18, 2025
7 min read