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Grokking the Coding Interview Patterns in Python

Minimum Window Substring

Understand how to apply the sliding window technique to solve the minimum window substring problem. Learn to find the shortest substring in one string containing all characters of another, accounting for character frequency. This lesson helps you implement and optimize solutions efficiently.

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Statement

Given two strings, s and t, find the minimum window substring in s, which has the following properties:

  1. It is the shortest substring of s that includes all of the characters present in t.

  2. It must contain at least the same frequency of each character as in t.

  3. The order of the characters does not matter here.

Note: If there are multiple valid minimum window substrings, return any one of them. ...