6 min read A decision procedure for recognizing which algorithm pattern a problem wants, with the trigger phrase, data structure, and canonical problems to drill for each. Read article
5 min read The no-division array question rewards a prefix-and-suffix pass, and the O(1) space follow-up is where most candidates stumble. Read article
7 min read A reference table mapping fifteen coding-interview patterns to the signal that triggers each one and the canonical problem to learn it on. Read article
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