[Elite Hacker 69]

Hey all

I'm not sure how many of you know about Project Euler but basically it was a site designed to make people either learning to program or experienced programmers think on their own to figure solutions to several (I didn't see them all but I think most were mathematical) problems.

Anyway they could be answered in any language and it was just in spare time.

I was looking for some to use because I found out that unfortunately Project Euler's database was compromised and it is now offline.

Here is a list of some sites I found from quick google searches.

NOTE (Click to View)
As of June 18, 2014 (date of posting) I have not actually looked at any sites. I had some free time posting and decided to post before checking them out. I got most of them from stack overflow but they all seemed credible.

• TopCoder
  


• OnlineJudge
  


• Python Challenge
  


• CodeGolf
  


• Another list of sites (Bill The Lizard
  


• MindCipher
  


• Google Code Jam
  


• Spoj]
  


• CodeKata
  


• CodeChef
  


• CodingBat
  


• OnlineJudge (Timus.Ru)
  


• Programming Problems (acm.hit.edu.cn)
  


• PKU JudgeOnline