Word Pattern Matching - LeetCode 290 Explained (Python Solution)

Published: 09 January 2026
on channel: CodeLucky

Learn how to solve the Word Pattern problem (LeetCode 290) efficiently using Hash Maps! 🧩

In this video, we break down the logic behind pattern matching strings. We explore why a simple one-way check isn't enough and how the concept of Bijection (one-to-one mapping) is the key to solving this problem correctly without bugs.

Whether you are a beginner or preparing for coding interviews, this visual guide will make the concept crystal clear.

Key Topics Covered:
Understanding the Problem Statement
Visualizing 'abba' pattern matching
Handling edge cases and mismatches
Python solution walkthrough
Time & Space Complexity analysis

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Chapters:
00:00 - Introduction
00:17 - The Problem Statement
00:41 - Visual Example - Match
01:05 - Visual Example - Mismatch
01:26 - Core Concept: Bijection
01:49 - Algorithm Strategy
02:16 - Code Implementation
02:44 - Complexity Analysis
03:05 - Summary
03:26 - Outro

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