A little BUG

meph · Post by **meph** » Sun Jul 13, 2003 2:31 pm

Just try out the following code for problem 10209 :

  void main(void)
  {
  }

Very funny !

.. · Post by .. » Sun Jul 13, 2003 5:26 pm

oh~~
how do you discover that??~~

bugzpodder · Post by **bugzpodder** » Mon Jul 14, 2003 5:29 am

try it on problem 194, even FUNNIER

shamim · Post by **shamim** » Mon Jul 14, 2003 8:42 am

What kind of joke is this.

meph, how did u know about this.

[/b]

Ivor · Post by **Ivor** » Mon Jul 14, 2003 11:18 am

seems to be a bug of the special correction program... or something... it's unfair 10209... I was holding a first rank saome year ago -- and I know 0.000 is not possible there without cheating the way most of you have done. SHAME!

Ivor

meph · Post by **meph** » Mon Jul 14, 2003 11:28 am

Ok, I admit, it's not nice. But I discovered it by accident, after having solved corectly the problem (I'm very sure of this) ( my best time being 00:0.211 with 392 k memory ). What I did was to try to speed up things by using fread and fwrite, so I would send a source to find out some limit for maximum input ( see if it doesn't exceed 2M), and though sacrifying a "Wrong answer". I was astonished, since the input was smaller, and the program terminated with "Accepted"

The conclusion : the program I presented you would also get "Accepted".
So, finding it by mistake, after solving the problem, and indeed exploiting it, I don't consider as "cheating".
The problem is really simple if you do some "integration"

meph · Post by **meph** » Mon Jul 14, 2003 11:29 am

P.S. : I would be very glad if the problem would be rejudged after the BUG is fixed.

Dominik Michniewski · Mon Jul 14, 2003 11:37 am

Did you inform about this site-administrators ? They not read every post in board ....

Best regards
DM

meph · Post by **meph** » Mon Jul 14, 2003 11:47 am

Don't know how

Dominik Michniewski · Mon Jul 14, 2003 12:26 pm

send mail to acm@uva.es if I correct remember and write, what is going on

Best regards
DM

Ivor · Post by **Ivor** » Mon Jul 14, 2003 8:27 pm

I was astonished, since the input was smaller, and the program terminated with "Accepted" The conclusion : the program I presented you would also get "Accepted".
So, finding it by mistake, after solving the problem, and indeed exploiting it, I don't consider as "cheating".
The problem is really simple if you do some "integration"

Accepted does not mean right. And if you got accepted having, all in all, a program that produces a wrong(!) answer -- that I consider cheating. I admit that this is a judge-side bug and you are not guilty of anything. I was basically referring to other people who sent your wrong(!) solution to get better time. 'SHAME!' was meant to them. See yourself how many 'right' submissions have been made using your techique. This problem is simple, but to rank first having a right solution -- that aint for everybody. That's a tough business.

It was about time something came up, because I was wondering what was this 0.000 time about.

I knew for definite that such a time is impossible.

Waiting for a fix,
Ivor

P.S. And next time do send a message to judge-stuff. Don't post it on the board. As you see it doesn't do any good for some people. But I respect you for saying it out!

shahriar_manzoor · Post by **shahriar_manzoor** » Tue Jul 15, 2003 9:15 am

When this problem was used in a contest there was no special judge. But people were not getting accepted so during contest time I wrote the special judge in ahurry. So now there is this mistake. I will try fix and rejudge soon but as you all know the admins are busy with upgrading the site now.

Post by **Carlos** » Wed Jul 16, 2003 3:40 pm

I sent that void program for problem 194...and got WA, what's the funny thing? I made that corrector and I want to correct it...
Carlos.

bugzpodder · Post by **bugzpodder** » Fri Jul 18, 2003 12:27 am

sorry Carlos, its all good. i just want to see if any of the lazy bums who instead of debugging their code, would try it as a shortcut to get AC on a problem that the couldnt get...

anupam · Post by **anupam** » Fri Jul 18, 2003 2:37 pm

to review one's stat;
http://acm.uva.es/cgi-bin/OnlineJudge?A ... o:123456LL
means the same as
http://acm.uva.es/cgi-bin/OnlineJudge?A ... o:123456AB
I think you all have underestood.
The security characters are not necessary.
It may be a bug or not.

OJ Board

A little BUG

A little BUG

Hehe

Problem 194?!?