test for proper criss-cross complicates a lot
The Goldbach Conjecture, Part 2
Right and wrong
7 segment LED display
Find best domino orientation
How to subtract?
GJam 2014 China Rd A: Maze with a Left Hand Rule
Knots Contest: Minimum Knots (ContestSuite)
USC Fall 2012 ACM: Rover Maze
Rubik's Mini Cube: Solve Randomized Cube in 11 Moves or Less; Score is by Time (msec)
Remove NaNs and numbers adjacent to NaNs
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