Describe an advanced data structure : Useful Math: The Inclusion-Exclusion Principle

The video tutorial explains the inclusion-exclusion principle, demonstrating how to count integers divisible by 2, 3, or 5, and addresses the issue of overcounting. It then transitions to counting square-free integers by considering non-square-free integers, using a recursive function to build subsets of primes. The tutorial provides a practical implementation example, emphasizing the importance of understanding prime factorization in counting problems.

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