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Data Structures
Master the building blocks of efficient algorithms
Which Data Structure Should I Use?
Answer a few questions about your use case, and we'll recommend the best data structure for your needs.
Question 1 of 8Score: 0
You need to frequently check if an item exists in a collection. The collection rarely changes after creation.
Learning Philosophy
This guide focuses on building intuition about when and why to use each data structure, rather than just how to implement them. Understanding the trade-offs helps you make better decisions in real-world programming and interviews.