This is (more or less) cribbed from the USC contest winner's solution.
Very fast and very compact solution. Nice usage of complex to calculate distance between points and recursion.
Solve the Sudoku Row
give nth decimal place of pi
pressure to dB?
Longest run of consecutive numbers
Rubik's Cube: 30 Moves or Less : Minimum Moves
Graceful Graph: Wichmann Rulers
USC Fall 2012 ACM : Code Word Minimum Flipped Bits
USC Spring 2013 ACM: Building Snowmen
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