Arrays and strings make up of Meta interviews. The highest frequency problems are Verifying an Alien Dictionary, Minimum Remove to Make Valid Parentheses, and Product of Array Except Self. learn these patterns: hash maps for lookup and counting, two pointers for sorted arrays, sliding window for substrings, and prefix sums for range queries. Meta expects solutions and clear complexity analysis. Practice until you recognize patterns within the first minutes of reading a problem.
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$ curl repovive.com/roadmaps/meta-interview-prep/arrays-strings/section-recap
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