On 7/15/07, <b class="gmail_sendername">Hugh Perkins</b> <<a href="mailto:hughperkins@gmail.com">hughperkins@gmail.com</a>> wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<span class="q">On 7/15/07, <b class="gmail_sendername">Hugh Perkins</b> <<a href="mailto:hughperkins@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">hughperkins@gmail.com</a>> wrote:
<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<span></span><div><span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I'd have a go in C# at 'chameneos', a concurrency
<br>benchmark,<br><br>
<a href="http://shootout.alioth.debian.org/gp4/benchmark.php?test=chameneos&lang=all" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://shootout.alioth.debian.org/gp4/benchmark.php?test=chameneos&lang=all
</a><br></blockquote></span></div><br></blockquote></div><br></span>Errr this is kindof a strange problem, the answer is always N * 2?<br><br>And there we see why I dislike shootout ;-)<br><br>
</blockquote></div><br>By the way, sortof felt guilty for not really creating imaginary Chameneos, and there's also the race condition to think about.<br><br>Race condition<br>===========<br><br>(or: why is it N * 2)
<br><br>There is an insane race condition in the question, which really renders the question rather uncool, but let's accept for now that it's ok to have insane race conditions in our programs. There are two possibilities:
<br><br>1. The insane race condition means that each test condition produces a different output, and the question is entirely invalid<br>2. The race condition has no affect on the output<br><br>If 1 is true, the question is entirely invalid. We're going to assume that the question is valid, which means the race condition has no affect on the result.
<br><br>That means that we can imagine the chaemeneos meeting in any order we like.<br><br>So we send c1 then c2. That's one meeting, and each chameneos has met other other chameneos.<br><br>We iterate N times, so C1 and c2 both met another chameneos N times, giving a total of N * 2.
<br><br>The colors are entirely irrelevant, and do not have any affect on the meetings, because they do not affect whether meetings take place or not.<br><br>Imaginary Chameneos<br>================<br><br>The question asks us to imagine N chameneos of different colors meeting. Chameneos do not really exist, they're an imaginary creation. So we have to imagine N imaginary chameneos meeting imaginarily.
<br><br>Rest assured, as I pressed the "Enter" key I did duly imagine the 100 chameneos in many colors all meeting and changing colors and becoming faded.<br><br>Oh, you want the computer to imagine the imaginary chameneos meeting and changing colors? Well now, a computer doesnt really imagine anything, we ascribe meaning to arbitrary symbols in our code.
<br><br>So, just to put your mind at rest, the function "Chameneos.Go( int N )" in my code represents N chameneos in many colors meeting and changing colors, so to the extent that a computer can imagine things, the computer really did imagine imaginary chameneos imaginarily meeting :-D
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