Validate Subsequence(s)
Series: Data Structures and Algorithms
Type: Subset Problems - Two Pointers
DS: Arrays
Code: Google Collab Notebook
Introduction
The "Validate Subsequence" problem is a fundamental algorithmic challenge: given two sequences, determine if the first is a subsequence of the second. This problem has many variations, from identifying a subsequence within a specific index range to addressing duplicates in the original sequence. These twists increase the problem's complexity.
In this page, I will try to collect variations and explain efficient solutions that optimize the spacetime complexity while discussing the benefits of the optimal approach vs. a brute-force one.
🚀
This post is part of a series focused on teaching common Data Structure + Algorithm interview questions to SDEs.
The series will cover a broad range of questions from Easy-Hard difficulty and will have helpful interview tips throughout the posts.
The series will cover a broad range of questions from Easy-Hard difficulty and will have helpful interview tips throughout the posts.