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Advanced trie applications beyond basic insert/search: binary trie for XOR maximization, palindrome pairs detection, and stream search using Aho-Corasick automaton concept.
High-frequency string problems from Meta and Google interviews: valid parentheses, longest substring without repeating characters, zigzag conversion, and string to integer.
Aho-Corasick automaton matches all patterns simultaneously in O(n+m+z) where z is the number of matches. Builds failure links on a trie for efficient multi-pattern search.
Complete recap of all 20 string algorithm problems: pattern recognition guide, algorithm selection, and complexity reference.
Master the mock interview process: how to structure 2-hour sessions, simulate real conditions, analyse performance, and track improvement week over week.