Blackness's blog

By Blackness, history, 8 years ago, In English

I'd like to know if I'm allowed to get some hints on problems(previous ones from past contest). If possible, can I have some help on the problem:Sonya and Queries?

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8 years ago, # |
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You can see their solution on the "tutorial" page which is linked on the bottom right part of the page of each practice question under "Contest Materials".