how can this be a valid solution?
Code can be made even smaller by replacing 'ans' in line 3 directly with line 2.
Replace NaNs with the number that appears to its left in the row.
Energy of a photon
Rotate input square matrix 90 degrees CCW without rot90
Converting numbers back from extended form
A (wrong) place for everything, and everything in its (wrong) place
Community Problem 500!
Circular Primes (based on Project Euler, problem 35)
Unique dice configurations
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