A simple active-recall technique for mastering LeetCode patterns

Short summary

A developer shares a study technique for mastering LeetCode problems: solve, explain aloud as if teaching a beginner, wait, then re-solve from memory. The method leverages active recall and forces articulation of the 'why' behind each line. Examples include Two Sum (hash map) and 3Sum (two-pointer) problems.

• •Technique: solve, explain aloud, delay, re-solve from memory
• •Active recall strengthens understanding vs passive re-reading
• •Demonstrated on Two Sum and 3Sum with before/after code

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