How to use template strings in Python 3.14 Speaking of template strings, we’re pretty excited about this next-generation method for formatting data. Find out how it transcends many limitations of ...
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The permutation must be exactly len(s1), so we always use a window of size n = len(s1). Build frequency counts need[26]: counts for s1. have[26]: counts for the current window in s2. Index with ord(ch ...
Given two strings s1 and s2, return true if s2 contains a permutation of s1, or false otherwise. In other words, return true if one of s1's permutations is the substring of s2.