Return the 3n+1 sequence for n
Implement a ROT13 cipher
Project Euler: Problem 10, Sum of Primes
Rotate a Matrix by 90 degrees
Poker Series 05: isStraight
Poker Series 09: IsHighCard
Project Euler: Problem 9, Pythagorean numbers
How many trades represent all the profit?
Poker Series 10: bestHand
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