Csongor Makka implemented core data-structure utilities for the Data-structures-and-algorithms-2025/DSA_courses_for_teamwork repository, focusing on features to support rapid prototyping and safe experimentation in C. He developed a prime number checker and a random array generator with built-in range validation, addressing the need for reliable data generation and robust input handling. His approach emphasized defensive programming, ensuring that invalid ranges were caught early to prevent runtime errors during array manipulation. The utilities were designed for reusability and ease of testing, reflecting a methodical application of algorithms and array manipulation skills within a well-scoped, single-feature release for the project.