The 15 LeetCode patterns that cover ~90% of coding interviews (opens in new tab)

Grinding 500 LeetCode problems is the slow way to prep. The fast way is pattern recognition — because most interview questions are a remix of ~15 underlying patterns. Once you can name the pattern in the first 30 seconds, you stop solving from scratch and start adapting a template you already know. Here are the 15 that, in my experience, cover the vast majority of what actually shows up. For each: the signal that tells you to reach for it, and a representative problem. The 15 patterns 1. Slid...