MathDB

Let

n>1

be a given positive integer. Petro and Vasyl play the following game. They take turns making moves and Petro goes first. In one turn, a player chooses one of the numbers from

1

n

that wasn't selected before and writes it on the board. The first player after whose turn the product of the numbers on the board will be divisible by

n

loses. Who wins if every player wants to win? Find answer for each

n>1

.
Proposed by Mykhailo Shtandenko, Anton Trygub

Problem Statement