Grokking Meta Coding Interview
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Minimum Window Substring (hard)
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Problem Statement

Given a string s and t of length m and n respectively, find the smallest substring in a given string 's' that contains all the characters (including duplicate) of another string 't'. The order of characters in 't' doesn't matter, but the substring in 's' must include all characters of 't', possibly with additional characters.

If no such substring exists, return an empty string.

Examples

Example 1:

  • Input: s = "xyyzyzyx", t = "xyz"
  • Expected Output: "zyx"

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