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AIME 2026a Problem 7

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Find the number of functions π\pi mapping the set A={1,2,3,4,5,6}A=\{1,2,3,4,5,6\} onto AA such that for every a∈Aa\in A, π(π(π(π(π(π(a))))))=a.\pi(\pi(\pi(\pi(\pi(\pi(a))))))=a.

Dataset text AIME 1983 to 2026. Quoted with source.

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