LeetCode #219: Contains Duplicate II in Java | Brute Force vs HashMap vs Sliding Window - Trick!
LeetCode 219: Contains Duplicate II may look like a basic duplicate check — but it mirrors challenges in real-time analytics, streaming data platforms, and cache validation systems. In this video, we waddle through three progressively smarter solutions: from brute force to hash maps to an elegant sliding window technique.
We’ll show you how each step reduces unnecessary work and how the final approach mirrors real-world optimizations engineers rely on at top companies. This isn’t just about solving the problem — it’s about thinking like a systems designer.
Whether you're prepping for your next FAANG interview or just want to sharpen your algorithmic thinking, this is one you’ll want in your ducky toolkit.
Chapters:
0:00 Introduction
0:26 Brute Force
1:30 HashMap for Index Tracking
2:34 Sliding Window with HashSet
3:40 Summary
Видео LeetCode #219: Contains Duplicate II in Java | Brute Force vs HashMap vs Sliding Window - Trick! канала Algo Ducky
We’ll show you how each step reduces unnecessary work and how the final approach mirrors real-world optimizations engineers rely on at top companies. This isn’t just about solving the problem — it’s about thinking like a systems designer.
Whether you're prepping for your next FAANG interview or just want to sharpen your algorithmic thinking, this is one you’ll want in your ducky toolkit.
Chapters:
0:00 Introduction
0:26 Brute Force
1:30 HashMap for Index Tracking
2:34 Sliding Window with HashSet
3:40 Summary
Видео LeetCode #219: Contains Duplicate II in Java | Brute Force vs HashMap vs Sliding Window - Trick! канала Algo Ducky
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28 июня 2025 г. 12:00:04
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