tourist1331's blog

What are your tricks and tips for National Olympiads?
By tourist1331, history, 19 hours ago, In English

I’m not looking for "use fastio" or "use long long" advice—everyone knows that. I want the real magic.

I mean do you have tips like "in those type of problems you should think that" .

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19 hours ago, hide # |
 
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remove 1331 from your handle.

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    19 hours ago, hide # ^ |
     
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    no

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19 hours ago, hide # |
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interactive problem = binary search

Geometry = skip

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    16 hours ago, hide # ^ |
     
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    i almost got on the ioi team because of a geometry problem (where the only geometry was "reflect a point across a line") so if the geometry is simple it's actually a pretty good way to get a lot of points that most people will skip

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      12 hours ago, hide # ^ |
       
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      Correct me if i´m wrong (I am not very good at this codeforces thing) but wouldn´t you just multiply the given point (X and Y) by -1 to get the inversed point across the line y=x? I´m unsure on given constraints and input formats but it seems rather simple for a question that could qualify IOI teams.

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