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Cono Sur Olympiad
2016 Cono Sur Olympiad
3
3
Part of
2016 Cono Sur Olympiad
Problems
(1)
Winning Strategy
Source: Cono Sur Olympiad 2016, problem 3
8/28/2017
There are
2016
2016
2016
positions marked around a circle, with a token on one of them. A legitimate move is to move the token either 1 position or 4 positions from its location, clockwise. The restriction is that the token can not occupy the same position more than once. Players
A
A
A
and
B
B
B
take turns making moves. Player
A
A
A
has the first move. The first player who cannot make a legitimate move loses. Determine which of the two players has a winning strategy.
combinatorics
cono sur