Three humans and three monkeys (one big, two small) need to cross a river.
But there is only one boat, and it can only hold two bodies (regardless of their size), and only the humans or the big monkey are strong enough to row the boat.
Furthermore, the number of monkeys can never outnumber the number of humans on the same side of the river, or the monkeys will attack the humans.

How can all six get across the river without anyone getting hurt?

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参考答案：人+小猴过，人回====================》小——人人人大小
大猴+小猴过，大猴回==============》小小——人人人大
人+人过，人+小猴回===============》人小——人人大小
人+大猴过，人+小猴回=============》人大——人人小小
人+人过，大猴回================》人人人——大小小
大猴+小猴过，大猴回==========》人人人小——大小
大猴+小猴过，完成========》人人人大小小——

[ 本帖最后由 alloncrazy 于 2008-4-23 23:31 编辑 ]