olymmath

JBMO-SL 2014 C2

In a country with nn cities, all direct airlines are two-way. There are r>2014r>2014 routes between pairs of different cities that include no more than one intermediate stop (the direction of each route matters). Find the least possible nn and the least possible rr for that value of nn.

Dataset text NuminaMath olympiads. Quoted with source.

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2016

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