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
Solve the set of simultaneous linear equations
Check if number exists in vector
Square Digits Number Chain Terminal Value (Inspired by Project Euler Problem 92)
Golomb's self-describing sequence (based on Euler 341)
Flip the bit
Add all the numbers between two limits (inclusive)
Make your own Test Suite (part 2)
Monte Carlo integration: area of a polygon
Testing for randomness: uniform distribution of real numbers (distribution checking)
Testing for randomness: uniform distribution of integers
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