ISL 2010 C1
- Answer
In a concert, 20 singers will perform. For each singer, there is a (possibly empty) set of other singers such that he wishes to perform later than all the singers from that set. Can it happen that there are exactly 2010 orders of the singers such that all their wishes are satisfied? (Austria)
Dataset text NuminaMath olympiads. Quoted with source.
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2010
Solutions
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