thank you :D

Excuse me but how could you possibly imagine to put a boolean value such as true or false in a long array??!

I don't understand what is the nth term of the sequence... what is actually there in the input... i am confused...help

I really think using BigInt for Java users is necessary 'cause you can't just store an integer to a variable more than INTEGER_MAX.
Still, I'll try.....
Best of luck guys.... This is going to be a tough one....
Time Complexity... FORGET ABOUT IT. Time Complexity will surely reach to O(n^2) or O(n!)

True

Increase your code performance. Don't just loop in a loop in a loop in a loop..... which will cause the worst time complexity for the code to run. Keep it simple and readable.

I think I should learn more about regex.
It took me nearly 26 lines of rubbish code to pass this Kata :p

just throw the ArgumentError exception

GeeeeeeeeeeeeeeeeeeeeeksFooooooooooooooooooooooooooooorGeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeks

Nice use of recursive algorithm right there!

Actually, the variable x already has some assigned value. So, if you write the unicode of small letter x, the compiler will take it as the x we declared.
Amazing!

Thanks! Now I won't have to learn those nasty bitwise operations! LOL!