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Found winning strategy

Source: Mathematics Regional Olympiad of Mexico Southeast 2018 P1

October 23, 2021
winning strategypolygoncombinatorics

Problem Statement

Lalo and Sergio play in a regular polygon of n4n\geq 4 sides. In his turn, Lalo paints a diagonal or side of pink, and in his turn Sergio paint a diagonal or side of orange. Wins the game who achieve paint the three sides of a triangle with his color, if none of the players can win, they game tie. Lalo starts playing. Determines all natural numbers nn such that one of the players have winning strategy.