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JOM 2015
1
1
Part of
JOM 2015
Problems
(1)
Game on Graph
Source: Junior Olympiad of Malaysia Shortlist 2015 C1 (JOM P1)
7/17/2015
Baron and Peter are playing a game. They are given a simple finite graph
G
G
G
with
n
≥
3
n\ge 3
n
≥
3
vertex and
k
k
k
edges that connects the vertices. First Peter labels two vertices A and B, and places a counter at A. Baron starts first. A move for Baron is move the counter along an edge. Peter's move is to remove an edge from the graph. Baron wins if he reaches
B
B
B
, otherwise Peter wins.Given the value of
n
n
n
, what is the largest
k
k
k
so that Peter can always win?
combinatorics