The search term combines three key elements:

"Grokking the Coding Interview" provides a pattern-based approach to solving technical interview questions, focusing on essential techniques like Sliding Window and Two Pointers. Community-curated GitHub repositories offer free PDF summaries, such as the 16-pattern overview, and solutions for these core concepts. Explore community-contributed materials at GitHub - lakhbawa/PDF-Grokking Grokking the Coding Interview in 16 Patterns.pdf - GitHub

Great for sorted arrays where you need to find pairs or triplets.

I can provide a curated, free list of practice problems categorized by pattern tailored to your needs.