12 D — Ball

Правка en1, от lllAlonsolll, 2016-05-09 02:51:02

Hi guys! Can someone explain me please, how to use BIT in this problem? http://mirror.codeforces.com/problemset/problem/12/D I've seen than some contestants has solved using BIT but I didn't understand how they do. Thanks in advance! :)

Теги binary indexed tree

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en3 Английский lllAlonsolll 2016-05-10 05:50:41 0 (published)
en2 Английский lllAlonsolll 2016-05-09 02:54:19 7 (saved to drafts)
en1 Английский lllAlonsolll 2016-05-09 02:51:02 240 Initial revision (published)