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
Return 'on' or 'off'
Replace multiples of 5 with NaN
Convert Two Character String into a Binary Vector
PACMAT 05 - Optimized Ghosts, PACMAT increasing speed, 12 Lives
Minimum Set (A+A)U(A*A) OEIS A263996
Minimum Sum thru a Lower Triangle
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