Grokking the Coding Interview is an open-source book that provides a systematic approach to learning the patterns and techniques required to solve common coding interview problems. The book is available on GitHub and has gained a significant following among software engineers and interviewees.
Also known as the "Hare & Tortoise" algorithm, often used to detect cycles in linked lists or arrays. Merge Intervals: Handling overlapping time intervals or ranges. Cyclic Sort: grokking+the+coding+interview+github+pdf+full
Go to GitHub. Fork a legitimate pattern summary repo. Open LeetCode. Turn off your WiFi (so you can't search for solutions). Struggle through the problems. That struggle is where learning happens—not in a downloaded PDF. Grokking the Coding Interview is an open-source book
It's a popular (originally from Educative.io) that teaches coding interview patterns (sliding window, two pointers, fast & slow pointers, etc.), not a free book. Open LeetCode