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Thinking Out Loud – EGMO 2015 Problem 5

EGMO 2015, Problem 5. Let \(m, n\) be positive integers with \(m > 1\). Anastasia partitions the integers \(1, 2, \dots , 2m\) into \(m\) pairs. Boris then chooses one integer from each pair and finds the sum of these chosen integers. Prove that Anastasia can select the pairs so that Boris cannot make his sum equal to \(n.\)

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Thinking Out Loud

by/di Alessandra Caraceni

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My EGMO – Camilla

An interview with Camilla Casamento Tumeo on her EGMO experience.

Un'intervista con Camilla Casamento Tumeo sulla sua esperienza alle EGMO.

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My EGMO – Veronica

An interview with Veronica Sacchi on her EGMO experience.

Un'intervista con Veronica Sacchi sulla sua esperienza alle EGMO.

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My EGMO – Maria Chiara

Maria Chiara Ricciuti recounts her EGMO experience.

Maria Chiara Ricciuti ci parla della sua esperienza alle EGMO.

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Tags:  myegmo