Problem 5 winning strategy
Source: PAMO 2017 Problem 5
July 5, 2017
combinatoricsgame strategy
Problem Statement
The numbers from to are written on a board. Deka and Farid play the following game :
each of them, on his turn, erases one of the numbers. Anyone who erases a multiple of or loses and the game is over. Is there a winning strategy for Deka ?