r*****t
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zdg (zdg) 于 (Wed Jan 31 10:01:54 2007) 提到:
on an island there are snakes of 3 different colors. blue, red, yellow.
every time 2 snakes of different colors met, they both change their color to
the 3rd color. eg, if a red snake meet a yellow snake, they both change to
blue.
now if we know at a certain time, there are 13 blue, 15 red, and 17 yellow
snakes, question: could the snakes meet so that eventually all snakes become
same color?
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