Remove hint.html and index.html
As per discussions on GitHub the index.html and hint.html files should be deleted in favour of README.md files (from any .text/.txt/.markdown/.md files which will be turned into README.md in an upcoming commit).
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta name="GENERATOR" content="mkd2html 2.1.5a DL=DISCOUNT">
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<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
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<link rel="stylesheet"
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type="text/css"
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href="../hint.css">
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<title>Most able to divine code gaps</title>
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</head>
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<body>
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<h1>Most able to divine code gaps</h1>
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<p>Derek Anderson</p>
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<h2>Judges' comments:</h2>
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<h3>To use:</h3>
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<pre><code>make
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./prog < textfile
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</code></pre>
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<h3>Try:</h3>
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<pre><code>./prog < prog.c
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./prog < prog.orig.c
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./prog < hint.text
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</code></pre>
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<h3>Selected Judges Remarks:</h3>
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<p>With this entry, you won’t need to turn your monitor <a href="http://en.wikipedia.org/wiki/River_%28typography%29">upside down</a>!</p>
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<p>Compare <code>prog.c</code> and <code>prog.orig.c</code> and find out why we had to modify the entry, and what confused the author
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(see the author’s remarks). No, it was not the shape of the Roman V that we, or the compiler, didn’t like.</p>
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<h2>Author’s comments:</h2>
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<h2>Compiling the program</h2>
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<pre><code>gcc -Wall -Wextra -Wpedantic -O3 -std=c11 prog.c -o prog
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</code></pre>
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<p>Also works with a standard of c99, but c90/c89 will not compile due to
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for loop initial declarations, along with additional warnings about
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variable length arrays and lack of a return statement.</p>
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<h2>Additional info</h2>
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<p>This small program, when given text on stdin, will produce a pattern of
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squiggly lines. This pattern is deterministic, and it shouldn’t be too
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difficult to determine from whence they come. There is even a comment
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that describes the highlighted phenomena in the source, for those that
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require a small nudge. With denser text blocks, such as an essay or
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similar prose, the output can be rather pretty, in an chaotic emergence
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sort of way. Try using this file, or the source file as inputs.</p>
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<p>In its current form, this program can handle lines of length 255; to
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adjust this limit, change the variable <code>a</code> at the top of the source.
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Other adjustments, such as the exact printed characters, are rather
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easy, once sufficient reverse engineering has occurred. Improvements
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such as proper handling of tabs are left as an exercise to the reader.</p>
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<p>In developing this program, the author found a potentially interesting
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bug. If the expression <code>(j=k,j)</code> (near the middle of the source) is
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changed to <code>(j=k,k)</code>, the program produces different output. The author
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used compiler gcc 5.4.0, compiled for x86_64-linux-gnu. Enabling or
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disabling optimization produces the same results. The author is not
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sure who is the culprit, but instead shrugged and moved on with life.
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Of course, YMMV with your own environment.</p>
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<p>The structure of this program, as you may have deduced, is two for
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loops, one nested in the other. There is also a bunch of direct
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variable assignment, such as <code>j=k</code>. There is some filler fluff, such as
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<code>0-0+0</code>, but all that sort should be rather easy to spot. It was mostly
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added for the purpose of making certain things line up right, and only
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secondarily to obfuscate.</p>
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<hr />
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<TABLE><TR>
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<TD><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/3.0/88x31.png" /></a></TD>
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<TD><P>© Copyright 1984-2018,
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<A HREF="/judges.html">Leo Broukhis, Simon Cooper, Landon Curt Noll</A>
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- All rights reserved<BR>
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This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/">Creative Commons Attribution-ShareAlike 3.0 Unported License</a>.</P></TD>
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<TD> <!--<a href="http://validator.w3.org/check?uri=referer"><img src="http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01 Transitional" height="31" width="88"></a>--></TD>
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</TR></TABLE>
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</body>
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</html>
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