Solution to Fibonacci series problem of Codeeval
https://www.codeeval.com/open_challenges/22/
Solution to rightmost char problem of Codeeval
https://www.codeeval.com/open_challenges/31/
Solution to happy number problem of Codeeval
https://www.codeeval.com/open_challenges/39/
Solution to self describing number problem of Codeeval
https://www.codeeval.com/open_challenges/40/