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n nunbers in a circle such that noone exceed 60% of sum of 2 neighbors

Source: Tuymaada Junior 2004 p2

May 11, 2019
combinatoricsSum

Problem Statement

For which natural n≥3 n \geq 3 numbers from 1 to n n can be arranged by a circle so that each number does not exceed 6060 % of the sum of its two neighbors?
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