How to solve a range query problem

Revision en1, by svg_af, 2016-06-13 05:17:17

Hello there

I'm trying to solve this problem

I've thought alot about it and have no idea

Any clues would be appreciated

Tags query, range, subsequence, hint

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en1 English svg_af 2016-06-13 05:17:17 234 Initial revision (published)