Programming challenges

[HungSquirrel]

Know of any websites with good programming challenges to tackle? I like Lineman.net's Programming Challenges (http://lineman.net/article/programming/challenges). They are good beginner and intermediate challenges to be tackled in any language, but they don't have very many. (I just did a couple earlier to help me learn the basics of Ruby, which I can already tell I am going to like.)

[thumper]

Programming contests are great sources of questions.

Try this link http://www.acm.inf.ethz.ch/ProblemSetArchive.html or http://www.sppcontest.org/problems.html (official ACM site).

It points to some questions from the ACM Programming Contest. Good fun.

Or http://nzpc.otago.ac.nz/resources/index.htm. The NZ contest has a different structure where there are questions of marked difficulty. The easiest problems should be able to be completed by most people learning to program.

[Viro]

TopCoder at http://www.topcoder.com is what I normally do for my programming challenges.

[DirtDawg]

Holy crap guys Thanx! I been looking for pages just like these off and on for months with limited success. It never occured to me to ask someone. :)

[JmSchanck]

I've been doing OSIX (http://www.osix.net) challenges for a while and its alot of fun. There are 13 regular challenges which you have to complete in order and some 18 bonus levels that you can do whenever you want.

[HungSquirrel]

Those seem cool (I can't tell...I can't make it past the first one...more on that in a minute!), but they seem to be more hacking challenges than programming challenges, similar to the ones at Learn To Hack (http://learntohack.org/).

Any hints on the first level? I've tried doing it in hex, doing it in decimal and converting it to hex, doing it in decimal and converting it to octal... I guess I'm not looking at it the right way.