Rosetta Code

De Bruijn sequences: Difference between revisions

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De Bruijn sequences (view source)

Revision as of 13:01, 1 September 2019

191 bytes removed ,  4 years ago
m
simplified the making the sequence invalid (part of the last task requirement).
m (→‎{{header|REXX}}: added a programming note.)
m (simplified the making the sequence invalid (part of the last task requirement).)
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:*   Reverse the de Bruijn sequence.
:*   Again, perform the (above) verification test.
:* &nbsp; ExtractReplace the 4,444<sup>th</sup> digit fromwith a period (.) in the original de Bruijn sequence.
:::* &nbsp; Add &nbsp; '''1''' &nbsp; (unity) to that digit, &nbsp; and take the right-most digit of that sum.
:::* &nbsp; Replace the original digit with the above digit &nbsp; (in the de Bruijn sequence).
:::* &nbsp; Perform the verification test (again). &nbsp; There should be several PIN codes missing.
 
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