HMMT November 2015 U13
- Guts
- Answer
Consider a grid of squares, each of which are originally colored red. Every minute, Piet can jump on one of the squares, changing the color of it and any adjacent squares (two squares are adjacent if they share a side) to blue. What is the minimum number of minutes it will take Piet to change the entire grid to blue?
Dataset text NuminaMath olympiads. Quoted with source.
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