China Mathematical Olympiad 1994 problem2
Source: China Mathematical Olympiad 1994 problem2
September 17, 2013
pigeonhole principlecombinatorics unsolvedcombinatorics
Problem Statement
There are pieces of candy held in trays(). An operation is defined as follow: take out one piece of candy from any two trays respectively, then put them in a third tray. Determine, with proof, if we can move all candies to a single tray by finite operations.