A A Man and his Umbrellas A Simple Music Encoder Airport Arrivals/Departures - #1 B Best travel C Calculate Fibonacci return count of digit occurrences Can you get the loop ? Common Denominators Containers Convert A Hex String To RGB Count IP Addresses D Digits Directions Reduction F Fibonacci Streaming First non-repeating character First Variation on Caesar Cipher G Gap in Primes Greed is Good H Human Readable Time I Int32 to IPv4 Integers: Recreation One Is my friend cheating? Is the King in check ? J Josephus Permutation Josephus Survivor L Land perimeter Last digit of a large number Let's Play Darts! M Maximum Contiguous Sum Maximum subarray sum Mean Square Error Merged String Checker N Not very secure Number of trailing zeros of N! O One-Semicolon Fibonacci Stream P PaginationHelper Perimeter of squares in a rectangle Pete, the baker Pick peaks Primes in numbers Product of consecutive Fib numbers R RGB To Hex Conversion ROT13 S Scramblies Simple Pig Latin String incrementer T Tic-Tac-Toe Checker W Weight for weight What's a Perfect Power anyway?