说明：  有三个传教士和三个野人过河，只有一条能装下两个人的船，在河的任何一方或者船上，如果野人的人数大于牧师的人数，那么牧师就会被吃掉。设计方法让所有人安全渡河。
(There are three missionaries and three Savage river, only one person can hold two boats, boat or on either side of the river, if the number is greater than the number of savage priest, then pastor will be eaten. Design approach for all safety crossing.)