This is a 7-segment:
It's a 3-by-3 char matrix.It has made by 3 characters: '_' , '|' and ' ' (space).
Using these 3 characters make the input number on the 7-segment. (Input is 0-9).
quite a job to find those binary code accordingly.
Extract leading non-zero digit
First N Perfect Squares
Back to basics 21 - Matrix replicating
How to subtract?
Create matrix of replicated elements
Find all repeated numbers
Draw 'O' !
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