Grinding LeetCode: A Guide to Mastering It

Introduction

• LeetCode can be life-changing, especially for getting high-paying jobs.
• Despite criticisms of its usefulness, it has personal value if it helps secure a job.
• Grinding LeetCode is presented as academically challenging, even compared to high school and college courses.

The Challenge of LeetCode

• LeetCode is harder than high school or college subjects for some.
• Programming can be more challenging than technical subjects like calculus and physics.
• LeetCode problems can feel uniquely difficult and can shake confidence.

Learning and Improving

• Intelligence is not the limiting factor; it's about systems and methodology.
• Learning from solutions was once difficult due to poor explanations.
• The process is critical; repetition is essential for mastery.

The Importance of Repetition

• Learning through repetition, similar to learning math as a child.
• Many fail to practice adequately, which is why they don't improve.
• Basic algorithms like binary search should become second nature.
• Repetition helps in understanding and internalizing algorithms.

Practical Advice on Repetition

• Focus on core algorithms: binary search, DFS, BFS, sliding window, etc.
• Get good at basics before attempting complex problems.
• Set realistic targets: first, master core algorithms.
• Implement algorithms multiple times to reduce cognitive load.

Applying Learnings to LeetCode

• With core skills, focus shifts to applying them to complex problems.
• Avoid tricking yourself into thinking you understand without repetition.

Advanced Learning Techniques

• Understand the 'why' behind algorithms, not just the 'how.'
• Consider proofs and the reasoning behind algorithms.
• Use pen and paper to work through examples and edge cases.
• Develop a deeper understanding of conditions, like in two pointers.

The Role of Structure and Routine

• Structure in childhood learning is beneficial; consider adopting it.
• Handwritten notes, thought process explanation, and repetition remain potent tools.
• Too much freedom can be a barrier; structured learning blocks may be helpful.

Conclusion

• LeetCode mastery is achievable through methodical practice and understanding.
• The blend of structured routines and curiosity-driven learning is key.