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Fast way to do this
By Dumbledore, history, 8 years ago, In English

I have a problem were I need to answer two kinds of queries. The first query is to change the value of number at index i of the array to x. The second one is to find the number of elements lesser than x in (index) range [0, r]. Could you help me on this?
Thank you in advance.

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8 years ago, # |
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here

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8 years ago, # |
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You must read about Index Trees.

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click or click2

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