Landon Curt Noll
4ee4c731f7
While not strictly necessary, replacing the two ASCII tab characters in the markdown copyright comment makes it easier to detect problematic TAB indentation within markdown files. After this commit, only 90 markdown files have leading ASCII TAB characters. And again, while not strictly necessary, we can consider running expand on those 90 markdown files to see what effect that might have on the HTML files they produce. Replace leading ASCII TAB characters with multiples of 8 ASCII SPACE characters (the default action of the `expand(1)` tool) might have an negative effect on some HTML formatting where **hack-a-round** formatting was attempted to fix broken indentation caused by problematic ASCII TAB characters. Think of this as a baseline for evaluating leading TAB characters within markdown files. TODO: Consider either using `expand(1)` to replace leading ASCII TAB characters with multiples of 8 ASCII SPACE characters AND/OR modifying the appropriate `bin` tool to convert leading ASCII TAB characters into multiples of 8 ASCII SPACE characters.
113 lines
1.9 KiB
Markdown
113 lines
1.9 KiB
Markdown
## To build:
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``` <!---sh-->
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make
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```
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There is an unobfuscated version of this entry. See [Alternate
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code](#alternate-code) below.
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## To use:
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``` <!---sh-->
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./konno N
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```
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## Try:
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``` <!---sh-->
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./try.sh
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# you can also specify numbers to try before the random and preselected ones:
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./try.sh 111 222 333 444 555 666 777 888 999
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```
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Try running [try.sh](%%REPO_URL%%/2012/konno/try.sh) a number of times as the first part randomly
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selects ten numbers to try.
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## Alternate code:
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An alternate version of this entry, [konno.alt.c](%%REPO_URL%%/2012/konno/konno.alt.c), is provided.
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This alternate code is an unobfuscated version of the winning code.
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### Alternate build:
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``` <!---sh-->
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make alt
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```
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### Alternate use:
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Use `konno.alt` as you would `konno` above.
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## Judges' remarks:
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This entry is a good one-liner to analyze completely.
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For extra credit, what are the minimal changes to convert it to
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64-bit integers so that it could print 32 lines?
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## Author's remarks:
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### Remarks
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This program outputs [elementary cellular
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automaton](http://mathworld.wolfram.com/ElementaryCellularAutomaton.html)
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patterns.
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Try:
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``` <!---sh-->
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./konno 30
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./konno 90
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./konno 102
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./konno 109
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./konno 165
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```
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There are 256 (from 0 through 255) possible rules.
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### Obfuscation
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This program uses bit operations. I think
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``` <!---c-->
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7&O<<!o>>!o+29
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```
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is an interesting operation. This isn't equal to
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``` <!---c-->
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7&O>>29
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```
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operation. What is the operation doing?
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### Limitation
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This program assumes that the size of `int` is 4.
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<!--
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Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
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You are free to share and adapt this file under the terms of this license:
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Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
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For more information, see:
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https://creativecommons.org/licenses/by-sa/4.0/
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-->
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