HMMT 2020 C3
- Combinatorics
- Answer
Each unit square of a square grid is colored either red, green, or blue. Over all possible colorings of the grid, what is the maximum possible number of L-trominos that contain exactly one square of each color? (L-trominos are made up of three unit squares sharing a corner, as shown below.)
Dataset text NuminaMath olympiads. Quoted with source.
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18
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