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Learn Data Structures and Algorithms in C#

Problem: Minimum Window Substring

Explore how to solve the minimum window substring problem by applying the sliding window technique with two pointers. Understand managing character frequency counts and optimizing the window size for an efficient O(m + n) time solution using C#. This lesson helps you implement and analyze a key string algorithm relevant to many coding challenges.

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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 ... ...