I'm nervous about starting my journey into Data Structures and Algorithms (DSA) because I only have about 3 months left before I need to start applying for jobs after graduation. I really want to take this seriously, but I'm struggling on how to begin. I usually find that I can understand the questions on LeetCode, but I often cannot find the solutions, and even after looking at them, I don't fully grasp them. In total, I've solved around 10 DSA problems, and that feels really embarrassing for a computer science student.
Given that I have a part-time job, I can realistically set aside about 2 hours each day. Is that enough time? How should I use this time effectively? Should I focus on Explore Cards, follow specific patterns, or maybe watch the solutions first? I feel sort of overwhelmed and doubt my abilities to tackle LeetCode and DSA in general, which makes me want to avoid it altogether. If anyone has been through this and has suggestions or a detailed plan to improve, I would greatly appreciate the guidance!
3 Answers
You're in a good spot with 2 hours a day for three months! Consistency is key. I'd recommend starting with curated lists like Neetcode 150 or Blind 75, which focus on essential patterns. Make sure to grasp the patterns instead of just memorizing the solutions. Spend the first month solving easy level problems until you really click with the patterns, then challenge yourself with medium problems. When you struggle with a problem, give it 20-30 minutes before checking hints or solutions. You've got this!
It sounds like you're mixing up practicing on LeetCode with actually learning DSA. Before diving into coding problems, it's crucial to get a solid understanding of core data structures like lists, stacks, queues, trees, and graphs, along with algorithms like searching, sorting, and traversals. Once you have that foundation, then tackle LeetCode problems as a way to apply what you've learned. There are a ton of great tutorials out there to help you with the basics.
I hear you! I understand the basics but struggle with actual problems too. One tip is to focus on the patterns in the problems and relate them to the concepts you're already familiar with. Bridging that gap often comes from actively applying what you know in a practical way.
Looking at solutions without understanding them doesn’t help in the long run. Try to dissect each solution: figure out what each part does and why it works. This active engagement will aid your learning much more effectively than just reading through solutions.
That gap you're feeling is totally normal and will close with practice! Start with easy problems based on specific patterns, like two pointers. Solve 5-10 easy problems on just that pattern first until you can do them without hints. Once you're comfortable, move to the next pattern. This helps build pattern recognition and understanding. Just remember to master one concept at a time.