In test 1 why the iron in x(4,1) did not moved to the top !?
x(4,1) is equidistant to both upper and lower magnet, that's why...
Replace NaNs with the number that appears to its left in the row.
All your base are belong to us
Project Euler: Problem 7, Nth prime
Better bullseye matrix
Path of least resistance - Move all direction
Text Processing - New
Graph Algorithms 3: Number of Connected Components
Diagonal of a Spiral Matrix
Largest Geometric Series
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