The key idea is to use a sliding window approach with two pointers. Maintain a window (substring) using two pointers, and a set to track characters within the current window. Move the right pointer to ...
# You are given a string, S, and a list of words, L, that are all of the same length. # Find all starting indices of substring(s) in S that is a concatenation of each word # in L exactly once and ...
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