MathDB

A. 762

Part of KoMaL A Problems 2019/2020

Problems(1)

Photos Of Trees

Source: KöMaL A. 762

3/20/2022
In a forest, there are nn different trees (considered as points), no three of which lie on the same line. John takes photographs of the forest such that all trees are visible (and no two trees are behind each other). What is the largest number of orders of in which the trees that can appear on the photos?
Proposed by Gábor Mészáros, Sunnyvale, Kalifornia
combinatoricskomal