Coding Challenges

http://codingbat.com/
https://projecteuler.net/
http://coderbyte.com/

List of Sites
http://codecondo.com/coding-challenges/

https://www.codeeval.com/
http://www.topcoder.com/
http://www.programmr.com/
http://www.codechef.com/

-0-

My suggestion:
Without learning fundamentals, doing all monkey business is useless.

-o-