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MathNet 2025-part-02 — 186 problems (EN–VI) Question 186

Math Olympiad Vault · MathNet 2025-part-02 — 186 problems (EN–VI)

Question 186

Let $m$ and $n$ be positive integers with $m \ge n$. There are $m$ cupcakes of different flavors arranged around a circle and $n$ people who like cupcakes. Each person assigns a nonnegative real number score to each cupcake, depending on how much they like the cupcake. Suppose that for each person $P$, it is possible to partition the circle of $m$ cupcakes into $n$ groups of consecutive cupcakes so that the sum of $P$'s scores of the cupcakes in each group is at least 1. Prove that it is possible to distribute the $m$ cupcakes to the $n$ people so that each person $P$ receives cupcakes of total score at least 1 with respect to $P$.