Developer shares two-step recall technique that improved LeetCode problem-solving skills

A software developer writing on DEV Community described how repeated failed attempts at medium-difficulty LeetCode problems prompted a search for a more effective learning method. The technique involves solving a problem, then verbally or written explaining the solution as if teaching a beginner, waiting briefly, and re-solving it from memory without referencing the original code. The approach draws on principles of active recall and spaced repetition, which research suggests strengthen memory more effectively than passive re-reading. The developer tested the method on classic problems like Two Sum and 3Sum, progressing from inefficient brute-force solutions to optimised approaches such as hash maps and two-pointer strategies. The core insight is that articulating the reasoning behind each step exposes gaps in understanding that silent coding typically conceals.