olymmath

TUYMAADA 2009 S2

  • Senior

A necklace consists of 100 blue and several red beads. It is known that every segment of the necklace containing 8 blue beads contain also at least 5 red beads. What minimum number of red beads can be in the necklace?

Proposed by A. Golovanov

Dataset text AI-MO AoPS. Quoted with source.

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