OJ Board

Thanks Jan!! I understand this issue now. I didn't know purpose of the yellow mark.

Allow me to again thank you

Add eps before printing anything. I used 1e-7. Hope it helps.

Thanks Jan!! I got accept immediately, but I can't understand that why I must use eps before printing? How eps works? I always use cout, setiosflags() and setprecision() when round off is required, and they works fine without EPS ...

sorry sir !
I didn't get your english .... plz make it more clear..... :(

sorry :oops:

I copy your source code and comple it by gcc 4.1.1. And I ran your program with input described above. It is sample input (see http://acm.uva.es/p/v2/201.html). So correct program will output as follows ...

You should try sample input which described in the problem statement as follow:
Your answer is exactly correct??

Rejudgement makes this problem very very difficult one. Now, accept rate is only 2.0%, of cource I got WA too :-(

http://acm.uva.es/p/problemstat.php?p=:10215

I checked the board, however, judges have just delete some tricky inputs.

http://online-judge.uva.es/board/viewtopic.php?t=12778

Why ...

hi harrym.

I'll show you which tree can be visible in sample input case. I hope this helps you. Points have beeen sorted by distance between tree and observer.


visible: (0,0)
visible: (1,0)
visible: (0,1)
visible: (1,1)
visible: (0,-1)
visible: (1,-1)
visible: (-1,0)
visible: (2,0)
visible: (-1 ...

As misof said, enve if the number of digits is undefined, you can use scanf. In your case, I think the number of integers is always two (because you wrote) , so you can use scanf as the follows:
There is no problem.

nooooo!!! I found my mistake... I'm stupid... and get accept.

I got wa many times, and I made many test cases. I'll show that here, I wish these help someone...

last case is very critical data for my code... jesus...

INPUT:

KEEP LEFT AND THEN GO RIGHT
CAS TO 20 KMH
GO FIRST RIGHT AT "SMITH ST ...

thanks akercito, if what you say is true, I think you should report this issue to acm. but I can't believe ... mmmm

Hi.

Try following input, you'll get correct output.
But another following input, you'll get incorrect output.
maybe there is a little bug

oh... I think it is very unfair. But I understand that making new problem is very difficult.

I have participated on Asia regional acm/icpc, and all problems are very unique fo me. Because of that almost we know www online judge like uva or pku, if same problem would be on test, many teams can ...

Hi.

I got many wrong answers... but I can't find where wrong in my code...
I attempted some inputs and all outputs are correct, mabe

please give some critical INPUT!!!! thanks.

Here is my code.