Every developer knows how important data structures are. No serious project can do without them, whether it’s query optimization, working with Big Data, or just writing clean and efficient code. It’s no wonder that during interviews, questions about trees, hash tables, and algorithm complexity are constantly asked!

Have you just started studying data structures? Want to refresh your knowledge acquired during your education? This book does not contain complex mathematics, boring proofs, or abstract theory. Instead, it offers clear explanations, practical examples, and real cases that developers face every day. You will learn how to speed up searches using the right data structures, manage task queues more effectively, or optimize data storage, for example.

The book is structured on the principle of “from simple to complex”: it starts with basic structures like arrays and linked lists and gradually moves on to more complex ones—stacks, queues, trees, hash tables, and graphs. Each chapter contains practical examples, exercises, and visual illustrations that help reinforce the material. All theory is supported by examples in Python—one of the main languages of modern development.

If you want not just to use data structures but to understand and apply them consciously, this book is for you.