Programming Practice and Challenges

I've been missing the computer challenges on brilliant, so I went looking for some other resources. I would highly recommend Codecademy, especially for those who only know a little programming or want to learn some new languages. If you're looking specifically for Python challenges, I've been enjoying Python Challenge.

Do any of you have recommendations of other sites to sharpen or expand programming skills?

Note by Eric Edwards
7 years ago

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13 votes

  Easy Math Editor

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

When posting on Brilliant:

  • Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .
  • Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.
  • Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.
  • Stay on topic — we're all here to learn more about math and science, not to hear about your favorite get-rich-quick scheme or current world events.

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold

- bulleted
- list

  • bulleted
  • list

1. numbered
2. list

  1. numbered
  2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1

paragraph 2

paragraph 1

paragraph 2

[example link]( link
> This is a quote
This is a quote
    # I indented these lines
    # 4 spaces, and now they show
    # up as a code block.

    print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.
2 \times 3 2×3 2 \times 3
2^{34} 234 2^{34}
a_{i-1} ai1 a_{i-1}
\frac{2}{3} 23 \frac{2}{3}
\sqrt{2} 2 \sqrt{2}
\sum_{i=1}^3 i=13 \sum_{i=1}^3
\sin \theta sinθ \sin \theta
\boxed{123} 123 \boxed{123}


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Project Euler has been mentioned here a few times in the past; another website that I think contains some nontrivial challenges is CodeEval. I myself am also very curious about your question, so I hope others will contribute more links.

John Smith Staff - 7 years ago

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Project Euler is very Powerful! Definitely start there, if you want to practice some number theory while you are at it I have seen the first 25 problems (out of like 600) solved by hand. Plus after you find a solution you can look at others more concise solutions.

Luke Nelson - 7 years ago

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I tried CodeEval, but it says that my submission fails. When I try the test cases though, it works perfectly. It doesn't give me any feedback on what went wrong, though, which is a shame.

Tim Vermeulen - 7 years ago

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There is good feedback actually, once you find it. It always says "submitted successfully" unless your file has a file extension it doesn't know about. Click the link named "score". There you see whether it failed or not. If it failed, click on the revision number in the first column, and you see what the output from the program was, including error messages from the compiling/parsing/run time system.

Arndt Jonasson - 7 years ago

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@Arndt Jonasson That's in fact exactly what I did, but after I click the revision number, I don't see the output and error messages, but I just see two tabs: Raw (my code) and Stdio (empty). Any idea what I'm doing wrong? Also, do you know whether using print() is the right way to output when using Python?

Tim Vermeulen - 7 years ago

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@Arndt Jonasson Nevermind. I forgot to uncomment the whole thing -.- That was pretty dumb. Thanks for your help.

Tim Vermeulen - 7 years ago

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Weekly algorithm contests in C++/Java/C#/Python, and ability to practice on previous challenges with lots of very good tutorials:


Online judges with lots of problems:



And, of course, USACO that holds monthly contests starting November to select the 4 high school students that represent USA in the International Olympiad of Informatics, the next Summer. It also has a system with tutorials and programming challenges that you have to overcome one level at a time to learn and face more difficult challenges.

And I was almost forgetting:

There are two multi-round yearly algorithm contests that are for everyone to participate hosted by Google and Facebook:

Google Code Jam

Facebook Hacker Cup

Google Code Jam usually starts around April and Facebook Hacker Cup in January. Additionally, you can see all previous problems for GCJ and test your solutions.

Pedro Osório - 7 years ago

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I will recommend following:

Highly recommended




Project Euler







Mayank Kaushik - 7 years ago

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USACO -> the USAMO of c.s.

Cody Johnson - 7 years ago

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Programming Praxis is a good one.

Thaddeus Abiy - 7 years ago

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jan;s LightOJ is also very good

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I have some recommended for you:

URI Online Judge.

List, on the Wikipedia :)

Andrias Meisyal - 6 years, 12 months ago

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Love that site! A great place for people who really love math, and Computer Science!

David Kroell - 7 years ago

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