This guide has moved. The argument now lives inside Coding Interview Patterns: The Complete List, next to the list of patterns it makes the case for, because the why and the what belong on one page.
The short version, for the reader in a hurry:
- The 500-problem trap. Grinding trains you to match problem statements. Interviewers hand you a statement you have not seen, on purpose. More problems deepen the trap.
- The math. LeetCode has more than 4,000 problems. The structures underneath them number about 42, and 14 carry most real loops. Learn the small set.
- What is graded. Not whether you have seen the problem, but the quality of your search through a small, labeled space.
Read the full argument inside the pattern guide
Want the problems chosen and sequenced for you? Start with Grokking 75 on a short timeline, or size your plan with How Many LeetCode Problems.