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Penalty Time: rule change (and the story behind it)
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Bartholomew Furrow  
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 More options Jul 31 2008, 7:08 pm
From: "Bartholomew Furrow" <fur...@gmail.com>
Date: Thu, 31 Jul 2008 16:08:02 -0700
Local: Thurs, Jul 31 2008 7:08 pm
Subject: Penalty Time: rule change (and the story behind it)

Dear Code Jammers,

Those of you who qualified for Round 2 should receive this message shortly,
but I wanted to set up a natural avenue for response and discussion, so here
goes.

We wanted to let you know that we have officially changed the rules for
penalty time in Google Code Jam back to what we originally intended.  The
rule that will apply is as follows:

Penalty Time = Total submission time of the *last input* you correctly solve
(time is measured from start of contest) + four minutes for each incorrect
small submission (only for small inputs you eventually solve)

If you're interested in the reasons why we made this change, read on.

We had planned to use this rule all along, after testing the alternative in
beta contests.  We implemented it in our code and altered our rules, but due
to a transcription error we didn't change our Terms and Conditions.

This inconsistency was pointed out to us after Round 1A, and we realized
that different people had been competing under different rules.  We advanced
the top 840 people from both versions of the rule (848 in total): in other
words, if you would have advanced under either version of the penalty time
rule, you advanced to Round 2.  After Round 1A we switched to the version in
the Terms & Conditions, since that was the one page all contestants had
seen.  Aside from a slight increase in the number of Round 2 contestants,
and of course some confusion, our error did not cause negative consequences
for anyone.

Since Round 1 ended, we have confirmed that we are able to use the penalty
rules based on the *last input* you correctly solve, instead of the *last
small input* you correctly solve.  We heard from many of you who liked the
original rules better, and the Code Jam engineering team agreed; so we're
changing our code back, changing our rules back, and (finally!) changing our
Terms & Conditions.  This change is not retroactive, so it does not affect
the scoring for any rounds that have already taken place.

Sorry for the two quick changes to the penalty rules; we hope you'll agree
that this final decision will make the contest better for everyone.

Bartholomew


 
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Shan Lu  
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 More options Jul 31 2008, 11:33 pm
From: "Shan Lu" <lus...@yeah.net>
Date: Fri, 1 Aug 2008 11:33:03 +0800 (CST)
Local: Thurs, Jul 31 2008 11:33 pm
Subject: Re:Penalty Time: rule change (and the story behind it)

  Things change and change, but the "dead" cannot come back to life.
  As a Chinese student, my country and Vietnam have been both friends and enemies for many times (like Britain and France). When they fought, tens of thousands of soldiers died. But when they became friends again like now, those soldiers could not come back from graves. Had there really been a "Heaven", they would have been in a greater agnoy when they saw the two countries became reconciled than that when they died . So in China people sometimes say that don't become a soldier who devotes his life to "nothing".
  Of course, GCJ is nothing political. But the change of rules really hurts!

在2008-08-01 07:08:02,"Bartholomew Furrow" <fur...@gmail.com> 写道:

Dear Code Jammers,

Those of you who qualified for Round 2 should receive this message shortly, but I wanted to set up a natural avenue for response and discussion, so here goes.

We wanted to let you know that we have officially changed the rules for penalty time in Google Code Jam back to what we originally intended.  The rule that will apply is as follows:

Penalty Time = Total submission time of the last input you correctly solve (time is measured from start of contest) + four minutes for each incorrect small submission (only for small inputs you eventually solve)

If you're interested in the reasons why we made this change, read on.

We had planned to use this rule all along, after testing the alternative in beta contests.  We implemented it in our code and altered our rules, but due to a transcription error we didn't change our Terms and Conditions.

This inconsistency was pointed out to us after Round 1A, and we realized that different people had been competing under different rules.  We advanced the top 840 people from both versions of the rule (848 in total): in other words, if you would have advanced under either version of the penalty time rule, you advanced to Round 2.  After Round 1A we switched to the version in the Terms & Conditions, since that was the one page all contestants had seen.  Aside from a slight increase in the number of Round 2 contestants, and of course some confusion, our error did not cause negative consequences for anyone.

Since Round 1 ended, we have confirmed that we are able to use the penalty rules based on the last input you correctly solve, instead of the last small input you correctly solve.  We heard from many of you who liked the original rules better, and the Code Jam engineering team agreed; so we're changing our code back, changing our rules back, and (finally!) changing our Terms & Conditions.  This change is not retroactive, so it does not affect the scoring for any rounds that have already taken place.

Sorry for the two quick changes to the penalty rules; we hope you'll agree that this final decision will make the contest better for everyone.

Bartholomew


 
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xreborner  
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 More options Aug 1 2008, 1:17 am
From: xreborner <xrebor...@gmail.com>
Date: Thu, 31 Jul 2008 22:17:33 -0700 (PDT)
Local: Fri, Aug 1 2008 1:17 am
Subject: Re: Penalty Time: rule change (and the story behind it)
Orz... good English...

On 8月1日, 上午11时33分, "Shan Lu" <lus...@yeah.net> wrote:


 
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z.beykov@googlemail.com  
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 More options Aug 1 2008, 4:38 am
From: "z.bey...@googlemail.com" <z.bey...@googlemail.com>
Date: Fri, 1 Aug 2008 01:38:22 -0700 (PDT)
Local: Fri, Aug 1 2008 4:38 am
Subject: Re: Penalty Time: rule change (and the story behind it)
Shan Lu, very deep interpretation. But in history there is a saying -
"There are no constant friends, just constant interests."

The change of rules is nothing dramatic here, it will still bring the
best problem solvers to advance.

Zdravko

On Aug 1, 5:33 am, "Shan Lu" <lus...@yeah.net> wrote:


 
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xreborner  
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 More options Aug 1 2008, 12:26 pm
From: xreborner <xrebor...@gmail.com>
Date: Fri, 1 Aug 2008 09:26:44 -0700 (PDT)
Local: Fri, Aug 1 2008 12:26 pm
Subject: Re: Penalty Time: rule change (and the story behind it)

> Penalty Time = Total submission time of the *last input* you correctly solve + ...

The word "Total" seems be lacked in the "Final Penalty Time Rules"
stated in the code jam front page?

On 8月1日, 上午7时08分, "Bartholomew Furrow" <fur...@gmail.com> wrote:


 
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sumuduf@gmail.com  
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 More options Aug 1 2008, 12:36 pm
From: "sumu...@gmail.com" <sumu...@gmail.com>
Date: Fri, 1 Aug 2008 09:36:29 -0700 (PDT)
Local: Fri, Aug 1 2008 12:36 pm
Subject: Re: Penalty Time: rule change (and the story behind it)
I think the word "total" here doesn't really make sense... "submission
time of the last [correct submission]" is precisely what they are
using.

On Aug 1, 10:26 am, xreborner <xrebor...@gmail.com> wrote:


 
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xreborner  
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 More options Aug 2 2008, 4:04 am
From: xreborner <xrebor...@gmail.com>
Date: Sat, 2 Aug 2008 01:04:55 -0700 (PDT)
Local: Sat, Aug 2 2008 4:04 am
Subject: Re: Penalty Time: rule change (and the story behind it)
Why? "Total" would mean that the submission time for all problems/
inputs are summed up to get the total time. Otherwise, only the the
submission time for the last problem you solved in the end is
considered.

On 8月2日, 上午12时36分, "sumu...@gmail.com" <sumu...@gmail.com> wrote:


 
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Bartholomew Furrow  
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 More options Aug 2 2008, 1:31 pm
From: "Bartholomew Furrow" <fur...@gmail.com>
Date: Sat, 2 Aug 2008 10:31:03 -0700
Local: Sat, Aug 2 2008 1:31 pm
Subject: Re: Penalty Time: rule change (and the story behind it)

"Total" here is indeed redundant.  Only the submission time for your last
correct solution is considered (+ the 4 minute penalties).


 
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