Editorial for Back To School '19: Beautiful_Times' Fruit Scam
Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.
Submitting an official solution before solving the problem yourself is a bannable offence.
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There are other solutions.
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2011 IMO P2