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Draw out a simple visual example.
Do it in something like Balsamiq.
Copy-paste it to visually show what the step-by-step process should look like.
Think about what variables you want at each step to answer the relevant question you have to be able to calculate the desired answer.
Ask yourself: What features of the state of each ‘step’ through the input can you think of to assign names to? Write the code needed to calculate/update these values with each iteration (or just have them as stub functions to be filled in later) and it could give you enough of a step in the right direction for the rest of the solution to make itself clear.
How I study
I have Neetcode questions in Anki.
I track which questions I’ve actually studied by checking them off on the Neetcode website.
I’m aiming to go through all questions of a type before moving onto the next type.
Creating Replit versions:
If I can’t access the question on Leetcode (it’s a premium question) or the Lintcode version (or if the Lintcode version is too different from the Leetcode question), I can create a Replit version in here.
Make the ‘template’ version of the question, then when you actually want to do the question, use that same Replit and you can just use the git feature to discard all of the changes you made to the code when you’re done.
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Algorithms-Specific Informational Websites (not programming challenge websites)
Nick Parlante - Pointers, Binary Trees, etc.
Very good explanations
OK explanations
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Interview Prep sites
rec'd by Choketsu
Codility
Rec'd by Toptal
rec'd by Choketsu
via Tom A.
Non-Interview-Prep Challenge sites
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Someone who works with machine learning explaining how Kaggle is a simplification of real ML work:
Jason B Hill's Project Euler solutions
Rec'd by Toptal, Chris Uga
rec'd by Choketsu
How to get started training at the USACO Gateway:
What is it like to attend the USACO training camp?
It's only a week
New people just get 3 hours of lab/lecture in the morning
The top guys do a contest every day. Sometimes the contest goes until after lunch, otherwise they just review after lunch. (Seems like 5 hrs/day)
Then everyone has fun for the rest of the day
If one is stuck on a particular section, is it worthwhile to keep on trying to solve the given problem, or should one move on to other sources in preparation for programming contests?
Richard Peng, one of the most successful Canadian IOI competitors of all time, on the USACO training pages:
"USACO training was put together before the major IOI escalation (Finland/Korea/Wisconsin). A lot of the techniques described on it are no longer useful on *OI and a lot of the 'hot' topics over the past few years are not covered. Also, a lot of the bottle necks on training are quite meaningless, and they typically cause a lot of frustration and time waste on the scale of months."
Topics
Linked Lists
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