1582 articles
Aho-Corasick matches all patterns simultaneously in O(n+m+z) where z is the number of matches. It builds failure links on a trie exactly like KMP does on a single pattern. Master multi-pattern search for FAANG string algorithm interviews.
Complete recap of all 20 string algorithm problems: pattern recognition guide, algorithm selection, complexity reference, and interview strategy for FAANG string questions.
Master 21 LeetCode design problems frequently asked at Google, Meta, Amazon, and Apple — LRU/LFU caches, Twitter feed, hit counter, autocomplete and more, all built from first principles.
LeetCode 146 LRU Cache is the most-asked design problem at FAANG. Build O(1) get and put using a doubly linked list and hashmap with full Python and JavaScript code.
LeetCode 460 LFU Cache asked at Google and Apple for staff-level roles. Achieve O(1) get and put using frequency buckets with doubly linked lists.