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Learn Data Structures and Algorithms in JavaScript

Problem: Minimum Window Substring

Explore how to solve the Minimum Window Substring problem by implementing a sliding window technique in JavaScript. Understand how to track character frequencies and optimize window size to find the smallest substring containing all characters from a target string. This lesson helps you apply time and space efficient algorithms with real coding practice.

We'll cover the following...

Statement

Given two strings s and t of lengths m and n, respectively, find the minimum window substring of s that contains every character in t, including duplicate characters. If no such substring exists, return an empty string "".

The test cases are generated such that the answer is always unique.

Note: Can you find an algorithm that runs in O(m+n)O(m + n) time?

Constraints:

  • m ==== s.length

  • n ==== t.length

  • 1≤1 \leq m, n ≤105\leq 10^5 ...