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LeetCode Prep Insights

Practical guides, tips, and stories on coding interviews and smarter LeetCode practice with AI.

215 articles

How to Design Test Cases for LeetCode Problems: A Step-by-Step Edge Case Playbook

Hidden test cases keep failing your solutions? Learn a practical, repeatable system for designing strong LeetCode test cases that catch bugs before you hit Submit.

LeetCodeTestingEdge CasesDebuggingInterview Prep

LeetCopilot Team

11 min

11/21/2025

System Design for Beginners: A Practical Practice Path

System design confuses beginners. Follow a repeatable learning path, see a mini-example, and get interview-ready by focusing on trade-offs.

System DesignInterview PrepBeginnersLearning Path

LeetCopilot Team

12 min

11/21/2025

How Do I Stop Second-Guessing My Approach During Coding Interviews? A Confidence-Building Framework

Self-doubt in coding interviews kills more solutions than wrong algorithms. Learn the exact mental strategies to trust your approach, make decisive decisions, and communicate with confidence even when you're uncertain.

Interview ConfidenceMental StrategiesDecision MakingInterview PrepSelf-DoubtCommunication Skills

Sarah Chen

16 min

11/20/2025

Why Do I Keep Forgetting LeetCode Solutions After Solving Them? (And How to Fix It)

You solve a problem, understand the solution perfectly, then forget it a week later. This isn't a memory problem—it's a learning strategy problem. Discover the science-backed techniques that turn fleeting understanding into permanent recall.

Learning StrategyMemoryLeetCodeInterview PrepStudy TechniquesRetention

Dr. Elena Martinez

18 min

11/20/2025

System Design for Your Brain: A LeetCode Retention Strategy

Treat interview prep like a distributed system. Learn to index patterns, cache key insights, and prevent 'data loss' during the actual interview.

System DesignLearning StrategyEngineering MindsetInterview PrepProductivity

Zikun Wang

12 min

11/20/2025

Why Just Saying 'Fuck LeetCode' Won't Get You Hired (And What Will)

Look, screaming 'fuck LeetCode' feels good. It validates the frustration. But it doesn't land you the job. Here's how to understand why the system exists—and how to beat it without losing your soul.

LeetCodeRantCareer AdviceInterview StrategyMental HealthTech Industry

Alex Chen

14 min

11/18/2025

How to Know When to Use a Hash Map in Coding Interviews: A Pattern Recognition Guide

Hash maps are everywhere in coding interviews, but knowing when to use them isn't obvious. Learn the exact signals that tell you a hash map is the right choice, with clear examples and common mistakes to avoid.

Hash MapsData StructuresPattern RecognitionLeetCodeInterview PrepProblem Solving

Sarah Chen

16 min

11/18/2025

Ready to Move from Easy to Medium LeetCode? Check These Signs

Solved 30 Easy problems but unsure if you're ready for Medium? These skill markers tell you when to level up—and when to wait.

Learning StrategySkill ProgressionLeetCodeSelf-AssessmentInterview PrepBeginner Guide

LeetCopilot Team

13 min

11/18/2025

Why Your Brain Dumps LeetCode Solutions (And How to Fix It)

Forget solutions instantly? It’s not you; it’s biology. Learn to hack your brain’s encoding process to turn fleeting code into permanent memory.

NeuroscienceLearning ScienceMemoryStudy HacksLeetCode

Dr. Aris Thorne

15 min

11/18/2025

The Art of Thinking Aloud: The Skill That Passes Interviews

Perfect code can still fail. Learn the 'Think Aloud Protocol' to communicate logic, handle dead ends, and turn interviewers into allies.

Soft SkillsInterviewingCommunicationCareer Advice

Zikun Wang

9 min

11/18/2025