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How did I master Algorithms and Data Structures?
Mastering algorithms and data structures is essential for anyone interested in computer science, software development and preparing for technical interviews.
Here is how I learned Algo & DS:
0. Choose a programming language
- You can choose any widely used programming language like Python, C++, Java, …. I have chosen Python.
- Practice basics until you are comfortable with syntax, control flow, functions and OOP.
1. Understand Fundamental Data Structures
- How do data structures work?
- How do they store/manage/retrieve the data?
- When to use them?
Data structures: arrays/lists, stacks and queues, linked lists, trees, maps, sets, heaps, graphs, …
2. Learn Core Algorithms
- Sorting: Learn how different sorting algorithms work and implement them yourself.
- Search: Learn how linear and binary search algorithms work, implement them yourself, and understand when to use one over the other.
- Divide and Conquer: Learn how to divide problem into subproblems, solve them independently, and combine results.
- Greedy: Learn to make optimal choices at each step for problem-solving.
To understand the topic and be able to solve problems I usually watch one video from Abdul Bari’s algorithms playlist
To better understand an algorithm and be able to answer "why/how" questions, I search for some articles online and read from multiple sources.
3. Practice Coding Problems
- Regularly solve problems on LeetCode, HackerRank, CodeSignal. I usually solve one problem in the morning before I start work.
4. Participate in Competitive Programming Contests
- Learn Under Pressure: Improve your problem-solving speed and accuracy by participating in contests.
5. Engage with the Community
- Join or create groups to study together. There are many groups on Telegram where people study together to prepare for coding interviews.
- Write a short post explaining your solution/approach and publish it in the solutions section of LeetCode.
6. Prepare for Technical Interviews
- Understand interview framework:
- Listen and understand the problem
- Ask clarifying questions
- Discuss potential approaches
- ...
- Mock Interviews: Consider using Pramp for your practice sessions. Pramp is an excellent platform to practice explaining concepts clearly, managing time effectively, and understanding diverse accents often encountered in interviews.
7. Stay Persistent and Reflect
- Periodically revisit topics to reinforce learning and analyze errors to identify areas for improvement.
Remember, mastering algorithms and data structures requires time and practice. Stay patient, keep coding, and don't hesitate to seek help when needed. Your effort will pay off in enhanced problem-solving skills and better career opportunities.
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