3294,3295 - problems

[ledins]

The ultimate bamboo eater is something strange - anyone has an idea? All my ideas run out of time.

the triangle counting is kind of easy, but what do you do with finding the lines with more than 2 points one them? I mean, how?

[nnahas]

The ultimate bamboo eater is something strange - anyone has an idea? All my ideas run out of time.

the triangle counting is kind of easy, but what do you do with finding the lines with more than 2 points one them? I mean, how?

I think 3295 has been solved there:
http://forums.topcoder.com/?module=Thre ... 81&start=0

I think that 3294 is not easy. I think I have a O(n (lg (n))^3) divide and conquer algorithm that uses range trees and that recursively bisects the point set according to bamboo "deliciousness", and intuitively I think that in practice my algo would run in O(n (lg (n))^2)

[shanto86]

well can u plz a bit elaborate on that 3294? i mean panda-bamboo??

Mahbub

[shahriar_manzoor]

Try this

http://www.northsouth.edu/html/acm/Prob ... ka2005.pdf

[Cosmin.ro]

Cool the judge solution for H is the same as mine

[shanto86]

i never thought there will be analysis of ICPC problems! thanks a lot sumit vi!

[shanto86]

i heard about Red black tree, i also heard about interval tree. but what is 2-D interval tree?? can any one tell me or give a link to any site where i can find it.

i gave a search at google but no satisfactory result

[nnahas]

i heard about Red black tree, i also heard about interval tree. but what is 2-D interval tree?? can any one tell me or give a link to any site where i can find it.

i gave a search at google but no satisfactory result

I think he meant 2D range trees, augmented with Max information: see this link: http://www.cs.aau.dk/~simas/aalg04/slides/aalg11.ppt

[shanto86]

hmm... till now i saw 4 different names of this data structure,
2D tree
2D interval tree
range tree
2D range tree



But thanks to u u gave me the right link