Discussion @ 1192. Ball in a Dream @ Timus Online Judge

It seems like that the author don't know the difference between speed and engery.

Posted by zhougelin 8 Sep 2004 19:42

Edited by author 08.09.2004 19:43

Re: It seems like that the author don't know the difference between speed and engery.

Posted by Vovka 21 Oct 2004 16:30

I don't think so.
T ~ V^2, assuming that gives ac

Re: It seems like that the author don't know the difference between speed and engery.

Posted by div 13 Sep 2006 17:22

hmm... i think the same. In each jump energy decreases K times, then (E = mv^2/2) speed decreases sqrt(k) times.
But my solution, which assuming that speed descreases k times (not sqrt(k)), got AC... Strange

Sorry for my poor English=)

Re: It seems like that the author don't know the difference between speed and engery.

Posted by Liu Cong 17 Aug 2007 22:09

No,you are wrong,it's correct.

Each time v decreases in sqrt(k) times,but we use Vx*Vy,so it decreases in k times.

Re: It seems like that the author don't know the difference between speed and engery.

Posted by Toyama Kazuha 5 Dec 2008 16:27

I agree with you

kinetic engergy decreases in K times
speed decreases in sqrt(K) times

Because E=1/2*m*v^2

Edited by author 05.12.2008 16:28

Discussion of Problem 1192. Ball in a Dream