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PROBLEM IN UNDERSTANDING PROPAGATING TREE(383C)
By javacoder1, history, 9 years ago, In English

I am having problem understanding how we are utilising Binary Indexed tree to solve the problem.The DFS part is clear as well as the notion of levels. But i am unable to understand how BIT is used. http://codeforces.me/contest/383/problem/C link.

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9 years ago, # |
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Here is the editorial http://codeforces.me/blog/entry/10476

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    9 years ago, # ^ |
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    Sir i had already read the editorial and then i made the comment.Please provide any other valuable resources.

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9 years ago, # |
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I would like to suggest you to read these resources for understanding BIT : http://zobayer.blogspot.in/2013/11/various-usage-of-bit.html http://community.topcoder.com/tc?module=Static&d1=tutorials&d2=binaryIndexedTrees http://codeforces.me/blog/entry/619

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    9 years ago, # ^ |
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    I do not have problem with BIT.It would be better if you could explain how it is used in this question

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