Compute a dot product of two vectors x and y
Rotate input square matrix 90 degrees CCW without rot90
sum of non-primes
Add offset to a signal
Extract leading non-zero digit
Replace NaNs with the number that appears to its left in the row.
Prime factor digits
It dseon't mettar waht oedrr the lrettes in a wrod are.
Sums with Excluded Digits
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