olymmath

HMMT November 2015 U1

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Farmer Yang has a 2015×20152015 \times 2015 square grid of corn plants. One day, the plant in the very center of the grid becomes diseased. Every day, every plant adjacent to a diseased plant becomes diseased. After how many days will all of Yangs corn plants be diseased?

Dataset text NuminaMath olympiads. Quoted with source.

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2014

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