Discussion @ 1470. UFOs @ Timus Online Judge

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Discussion of Problem 1470. UFOs

It is very simple problem

Posted by Dima_Philippov 9 Sep 2011 02:10

Just write 3d Fenvick Tree. And nothing more.

Re: It is very simple problem

Posted by Vishal Gupta 6 Jan 2015 18:46

Read 2D bit from this http://zobayer.blogspot.in/2013/11/various-usage-of-bit.html and http://community.topcoder.com/tc?module=Static&d1=tutorials&d2=binaryIndexedTrees and implement 3d bit and use inclusion and inclusion.

Re: It is very simple problem

Posted by Alibi 23 Jan 2015 16:56

May be you mean "exclusion & inclusion"?