Browse 4 notes tagged frequency counting.
Keep the submitted frequency-counting sliding-window solution and explain why maxFreq can retain its historical maximum.
Work through a sorting-based Group Anagrams solution, its repeated-array-copy cost, and a count signature for the fixed lowercase alphabet.
Start with Map frequency counting and sorting, then remove the O(n log n) sort with frequency buckets.
Compare sorting, Map-based frequency differences, and a fixed-size count array for Valid Anagram, including correctness, invariants, and complexity.
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