How I would learn Leetcode if I could start over

Summary

The speaker emphasizes the value of mastering data structures and algorithms through LeetCode challenges, despite their difficulty compared to traditional academic subjects. They argue that while most full-stack jobs might not require this knowledge, it is still beneficial and can lead to high-paying positions. The speaker shares their personal journey and offers advice on how to effectively learn and practice coding problems, stressing the importance of repetition, understanding core algorithms, and the 'why' behind solutions. They also highlight the need for curiosity and critical thinking to truly grasp complex problems, advocating for a structured approach to learning similar to that experienced in school.

Takeaways

• 🚫 The speaker does not encourage grinding LeetCode but acknowledges its value in improving coding skills and securing high-paying jobs.
• 📚 Despite most full stack jobs not requiring knowledge of data structures and algorithms (DSA), having a foundational understanding is still beneficial.
• 💡 The speaker argues that learning DSA is similar to learning other subjects in school that may not be directly applicable to one's job but are still valuable.
• 🔄 LeetCode problems can be more challenging than traditional academic subjects due to their complexity and the need for a systematic approach to solve them.
• 🤯 The speaker emphasizes that LeetCode is difficult and can be frustrating, but it's not about intelligence; it's about the learning process and methodology.
• 📈 The speaker learned LeetCode by studying solutions for hours, trying to understand why they worked, and then attempting to explain them in video form.
• 🔑 The process of learning LeetCode involves understanding core algorithms and practicing them repeatedly to build familiarity and speed.
• 🎯 The speaker suggests that the goal should be to master core algorithms rather than just solving LeetCode problems quickly.
• 🧠 Understanding 'why' an algorithm works is crucial for being able to apply it effectively to different problems, which requires deep thinking and curiosity.
• 📝 The speaker recommends using pen and paper to work through examples and think about edge cases to reinforce understanding.
• 🔄 Repetition is key in learning LeetCode, similar to how children learn basic math through repeated practice.

Q & A

Why does the speaker believe that grinding LeetCode is worthwhile despite its difficulty?

The speaker believes that grinding LeetCode is worthwhile because it can lead to high-paying jobs and has personally changed their life, including securing a job at Google.

What does the speaker suggest is the main difference between LeetCode problems and other academic challenges they've faced?

The speaker suggests that the main difference is not the level of difficulty, but rather the process and methodology required to solve LeetCode problems, which is more about systems and repetition than raw intelligence.

What is the speaker's opinion on the necessity of understanding data structures and algorithms for most full stack jobs?

The speaker acknowledges that most full stack jobs do not require knowledge of data structures and algorithms, but they still argue that having a basic understanding is useful.

Why does the speaker emphasize the importance of repetition when learning from LeetCode?

The speaker emphasizes repetition because it is a fundamental way humans learn, and it is particularly important for mastering the core algorithms and problem-solving techniques required for LeetCode.

What is the speaker's advice for someone who is struggling with LeetCode problems?

The speaker advises to focus on mastering core algorithms like binary search, DFS, BFS, and sliding window through repetition and practice, rather than jumping into complex problems.

How does the speaker compare the learning process of LeetCode to learning math or physics?

The speaker compares the learning process by stating that while LeetCode is difficult like math and physics, it is not more difficult, and the key to mastering it is through the same process of repetition used in learning math or physics.

What is the speaker's view on the common mistake people make when solving LeetCode problems?

The speaker believes the common mistake is not practicing repetition. People often think they understand a solution after seeing it once, but without repetition, they are unable to recall and apply the solution effectively later.

What is the speaker's recommendation for the initial target when solving LeetCode problems?

The speaker recommends that the initial target should be to get really good at core algorithms and not necessarily to solve LeetCode problems quickly.

Why does the speaker suggest that understanding 'why' an algorithm works is important for solving LeetCode problems?

The speaker suggests that understanding 'why' an algorithm works is important because it allows for a deeper comprehension that goes beyond memorization, enabling one to apply algorithms effectively to a variety of problems.

What role does the speaker believe curiosity plays in truly mastering LeetCode problems?

The speaker believes that curiosity is essential for mastering LeetCode problems because it drives the learner to ask questions, think about why solutions work, and explore creative examples and edge cases.

How does the speaker feel about the structure and discipline imposed during childhood learning and its application to adult learning?

The speaker feels that the structure and discipline imposed during childhood learning, such as repetition and note-taking, are very useful and should be applied to adult learning as well, as they help in mastering complex subjects like LeetCode problems.