Websites like projecteuler.net

Question

Sometimes I'm solving problems on projecteuler.net. Almost all problems are solvable with programs, but these tasks are more mathematical than programmatical.

Maybe someone knows similar sites with:

• design tasks,
• architecture tasks,
• something like "find most elegant C++ solution"?

Answer 1

I had a great time doing the Python Challenge! I learned Python to solve these challenges, I never regretted it.

Answer 2

It's a lot easier to create a web site where your score is based on whether the integer result you give is the correct one, than it is to create a web site which measures design, architecture or elegance.

Answer 3

I keep a few bookmarked along with Project Euler.

• TopCoder
• UVa Online Judge
• Python Challenge
• Mind Cipher
• Code Golf
• C Puzzles
• Ruby Quiz

Update:

I've collected these and links to several other puzzle sites in a blog post: Programming and Logic Puzzles.

Answer 4

It hadn't an update for some time, but might still be interesting: CodeKata

Answer 5

Google Code Jam

Answer 6

I prefer real-world sites like StackOverflow. The problems are more varied and a closer match for something you may actually encounter on the job, and not only do you grow your own skills you help others at the same time.

Answer 7

Here is a fresh one: http://www.javaist.com/rosecode

Answer 8

This here is a good one: https://www.spoj.pl/ The performance in the code becomes important too.

Answer 9

Newbie-friendly and just for fun: CodingBat.

Answer 10

Try2Hack was one of the greatest websites back in the day. I'm not sure if it's the same now (it's been around 10 years I think since I've visited it) but it was great fun at the time.

Answer 11

Try CodeChef

Answer 12

For elegant solutions, RefactorMyCode might be useful.

Answer 13

If you have a Facebook account, try facebook puzzles for more than a dozen or so programming problems. http://www.facebook.com/careers/puzzles.php.