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Обсуждение задачи 1265. Зеркало

C and Pascal
Послано Burunduk1 29 сен 2005 13:05
There are 2 same solutions (C, Pascal).
   C   solution gets WA, 9
Pascal solution gets AC

Why??? Please, give me some hints about it.
I think it's precision problems )
Послано Ivankov Dmitry 29 сен 2005 22:02
For example (sizeof(long double) == 8)
Re: I think it's precision problems )
Послано Burunduk1 29 сен 2005 22:28
I thought it's so only in Visual C.
GNU C and Borland C compilers use sizeof(long double) = 10.
Am I right?
Re: I think it's precision problems )
Послано Ivankov Dmitry 29 сен 2005 22:54
Yes.
But as far as I know Intel C++ compiler is used there. And in ICL (at least in 8.1) sizeof(long double)==8
This problem suppose using of long arithmetics (-)
Послано Vladimir Yakovlev (USU) 29 сен 2005 22:57
Re: This problem suppose using of long arithmetics (-)
Послано Burunduk1 30 сен 2005 00:14
Of course!
But solution without it is more short and beauty. :)
And it's more interesting to solve problem
using only Extended.
Re: This problem suppose using of long arithmetics (-)
Послано svr 4 фев 2007 14:24
But if juri suppose exact numbers
when answer is unequivocal it would be funny
try adjust eps-heuristics. Next time you would be killed by
rejujement.
I have Ac using 120-digits integers and dot-product as angle haracteristics. Thus use only +,-,*,<,==.
Re: This problem suppose using of long arithmetics (-)
Послано Vedernikoff Sergey 6 фев 2007 13:38
My program doesn't use any long arithmetics - only standard Pascal's real (or extended?) type, and it hasn't any problem with accepting this problem. If jury assumed using long arithmetics, then testset is very weak...
Re: This problem suppose using of long arithmetics (-)
Послано DixonD (Lviv NU) 13 апр 2007 17:25
Could anybody say me how find point, symmetrical to given point relatively some line?
Without division...
Thanks