FYI: The fastest solution mentioned at the problem description uses a lookup-table. Don't beat yourself too much.
Hello, William. I like very much the originality & especially the efficiency of your approach here. Am I correct in thinking that the existing code would struggle to correctly decode a message that was encoded from (say) "Beware of the Sasquatch Man's involvement in Operation Phoenix"? [I don't want to explain this, to avoid giving too many clues to others. But I hope you get my point.] Although I am confident you could tweak your code (if necessary) to handle such cases. —DIV
Return elements unique to either input
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
Set some matrix elements to zero
Maximum value in a matrix
Monte Carlo integration: area of a polygon
Arrange the names in alphabetical order (1)
Code breaker, Part II: Operation Orthos
What score did they give?
The twelve days of Christmas
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