Discussion @ 1114. Boxes @ Timus Online Judge

to those who use C++ and don't like long ariphmetics

Posted by jedimastex 28 Jun 2004 19:56

use formula (n+a)!/(a!n!)*(n+b)!/(b!n!)
all the variables should have type 'unsigned __int64'

Re: to those who use C++ and don't like long ariphmetics

Posted by Armen Tsirunyan 2 Dec 2008 02:04

Dear jedumastex!
It's really great that you have written the formula on a blyudechko with a light-blue koyomochka, but could you please be so kind as to PROVE(or at lest explain) why on earth does the formula work? Thanks in advance. My email is LordN3mrod@gmail.com

Discussion of Problem 1114. Boxes