leetcode-patterns
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leetcode-patterns
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Interview Prep - Ds & Algos - Arrays
Today, after updating my personal website, I shifted focus to a crucial aspect of tech interviews: data structures and algorithms. Starting with arrays, I've committed to tackling one topic per day, solving 3ish related LeetCode problems to reinforce my understanding. 📚 (This website is super useful - sorting leetcodes by patterns)
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Democrats Introduce Bill Banning Hedge Funds From Owning Single-Family Homes
He says things that are pro-labor. Then he does things like oppose minimum wage increases, support anti-union actions, appoint judges who will oppose unions or labor, appoint two very anti-labor assholes to the NLRB, and outright just not pay for labor. Trump is not "pro labor", he's just a liar.
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I created a Free Coding Interview Prep Platform with Video and Text Explanation containing 200 problems from all top problem lists (Blind 75, Prashad Leetcode Patterns, Neetcode)
Quality over quantity! I solved hundreds of them while preparing for big tech interviews and I can say with confidence after certain number of questions we have diminishing returns. A good base of questions with patterns clearly explained is all you really need. As of now there are many lists online Blind 75 (https://www.teamblind.com/post/New-Year-Gift---Curated-List-of-Top-75-LeetCode-Questions-to-Save-Your-Time-OaM1orEU), Prashad's leetcode patterns (https://seanprashad.com/leetcode-patterns/), curated list of problems from Elements of Programming.
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Ask HN: How do you make time for side projects and Leetcode grinding
Grinding leetcode is inefficient. What you should be doing is familiarizing yourself with the common patterns you might expect to see in an interview. Look at the blind 75 and https://seanprashad.com/leetcode-patterns/.
Initially, you don’t need to solve any of the problems from scratch. Look up the problem on YouTube and someone will walk you through it. This will build your intuition of when to reach for a heap or for a DP array or when to do BFS, etc. If you don’t know these, then watch another video explaining the concepts. These videos are often 10-15 minutes a day so with a 30 minute time commitment you potentially can get through 3 a day, getting you through the complete blind 75 (more than enough) in less than a month or 1 of each of SP’s 22 patterns in a couple of weeks.
The great thing is you don’t need dedicated time for this approach, you can often start a video while tackling laundry or doing some dishes.
Then, start putting these into practice but spend no more than 10-15 minutes on the problem. If you can’t solve it, go watch the video again. There are so many times where you can have the right approach but make a stupid mistake that will cause you to flounder and you can pick up a better way of doing it. Eventually you will be solving these in 10-15 minutes and the time commitment will have remained at a minimum.
After this, find a new job that is only 40 hours a week and voila you’ve just opened up 10-20 hours for personal projects.
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🎯 300+ LeetCode Problems are solved: What I Discovered! 💡
I used this list of patterns for my preparation, but you can use another; it's just an example of what it usually looks like. 😊
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How do you know what DS/A to use in a problem?
Sean Prashad has a good list that maps the type of problem to a particular pattern.
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Which curated list to grind next?
Sean Prashad: 212+54 problems
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I just started leetcoding. Will I still have enough time (with around 4 hours per day) to prepare for FAANG internship interviews within 1.5-2 months from now?
When I started grinding I had already taken a DS course so I was at least aware of hashmaps, arrays, trees, etc. but even leetcode easies we’re still a struggle and the ones I could do I wasn’t solving them optimally. Having that basic knowledge though allowed me to start struggling through the book I mentioned. EPI is harder than CTCI but it’s language specific and I already knew I was going to use python. I completely skipped bit manipulation and tries but I ended up getting a trie question in one of my interviews and that was by far the hardest question I’ve ever gotten, probably because i skipped tries altogether lol. I haven’t tried grokking. I started doing EPI by hand so that I was forced to think through solutions before writing them but if you feel like that’s unnecessary for you just type it but it def helped me since in interviews you have to discuss before coding. The DP section of epi was really hard so I didn’t complete it. From there I just started struggling through LC. After epi I started with easies but i didn’t stay there for long since epi is mostly mediums and some hards anyways. The biggest thing is to learn from every problem, even the ones you don’t finish. Truly take the time to understand a solution even if that means 45+ minutes of digging into it. The same patterns come up again and again so you’ll have to dig into them eventually. Identifying the patterns from the way questions are phrased come from quantity I feel like so doing a lot of LC problems is the way to go. My pattern recognition was on point after about 100 problems in total maybe. For LC i did 95% of all easies and mediums in [this]. Earlier I said I skipped DP in epi but def do dp leetcode problems. You don’t have to master it but def become familiar. If by the end of everything you’re able to knock out 70+ medium level questions then you should probably be good for internship interviews. Hope this helps and also if you take the blind 75 route NeetCode on YouTube has done all of them I think and he’s really good with explaining the problems. Take the time to understand each data structure individually before even attempting problems. I think EPI does a good job of that or you can just hop on YouTube. Good luck Glum Choice, I have faith that you will prevail 🏅
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Has anyone here found a job being self-taught?
LC refers to Leetcode problems (LC = LeetCode). While the Leetcode website itself is not the only place to practice, "Leetcode problems" refers to the general concept of programming interview problems involving data structures and algorithms.
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Cold calling companies to volunteer as an unpaid intern?
I am also new at leetcode. But from the advices I gathered and from my own experience, I will suggest to first learn all data structures. Once you understand, then start with the easy ones and gradually learn the patterns. Sean Prashad as a good list of the pattern you can find via this link: https://seanprashad.com/leetcode-patterns/
scratch-www
- Scratch is the largest free coding community for kids
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Screen-free coding for children: the xylophone maze
and https://codecombat.com, which has been around for a while now.
I think this paradigm (navigating a character using "move" function invocations) is good but kind of exhausts its usefulness after a while. I question whether my daughter learns coding this way or just is playing a turn based top down platformer. The most code like thing is when you use 'loops' to have characters repeat sequences of moves. I think when kids grok these things these apps become just types of glofiried education flavoured video games. There are a lot of things in kodable for instance that I feel are just basic web games with coding terms slapped on it.
https://scratch.mit.edu/ is more like 'programming' imo, even at the level of the objective -- having a blank canvas to create something. It seems a little advanced for my kids right now though.
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Ask HN: Yo wants to build a game, I'm lost. What can I do?
+1 Scratch! My son started with it, then expanded into Roblox/Lua.
Children can download other people's games and experiment there. Scratch also has pre-made art, sounds, music.
https://scratch.mit.edu/
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Ask HN: Platform for kids to learn how to code
Scratch.mit.edu is a highly-recommended place to start [1] https://scratch.mit.edu/
> Scratch is the world’s largest coding community for children and a coding language with a simple visual interface that allows young people to create digital stories, games, and animations. Scratch is designed, developed, and moderated by the Scratch Foundation, a nonprofit organization. [2]
1: https://scratch.mit.edu/
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Eligiendo un computador para desarrollo
https://scratch.mit.edu/ (Scratch version 2)
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i swear to god if i keep seeing projects abt these 4 franchises every single day i'm gonna break someone's kneecaps
Someone who uses scratch.mit.edu (like me)
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How to learn coding without a degree
Now that I think of it, I did start game development on scratch before going right into java (because of minecraft).
- Copii si programarea
- Teen school project
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Ask HN: Best tools for 4/5 year old to learn programming?
I'm looking for the best systems to help a 4/5 year old get the basics of programming. My daughter has shown interest in what I do, and loves puzzles and building things. Looking for something visual and fun that can start her down the path of logic and creating with computers.
I have a passing familiarity with Scratch [1], which I'm now looking into more, but am hoping others can share their knowledge and experience in this area.
[1] https://scratch.mit.edu/
What are some alternatives?
Reddit-wiki-programming - Resources to Learn Data Structures and Algorithms, ace competitive programming, Get a Job in Tech/CS
Node RED - Low-code programming for event-driven applications
Grokking-the-Coding-Interview-Patterns - This course categorizes coding interview problems into a set of 16 patterns. Each pattern will be a complete tool - consisting of data structures, algorithms, and analysis techniques - to solve a specific category of problems. The goal is to develop an understanding of the underlying pattern, so that, we can apply that pattern to solve other problems. [UnavailableForLegalReasons - Repository access blocked]
GDevelop - :video_game: Open-source, cross-platform game engine designed to be used by everyone.
tech-interview-handbook - 💯 Curated coding interview preparation materials for busy software engineers
blockly - The web-based visual programming editor.
reactjs-interview-questions - List of top 500 ReactJS Interview Questions & Answers....Coding exercise questions are coming soon!!
Godot - Godot Engine – Multi-platform 2D and 3D game engine
EPI-to-LC - Mappings of problems from the book Elements of Programming Interviews (EPI) to Leetcode
processing - Source code for the Processing Core and Development Environment (PDE)
LeetCode - A Markdown file that contains my solutions of LeetCode problems.
stencyl-engine - Create Flash, HTML5, iOS, Android, and desktop games with no code with Stencyl. This is the source to Stencyl's Haxe-based engine.