在河的一岸，人、狼、羊、菜、均要过河，船需人划，而且最多载一物，当人不在时，狼会吃羊，羊会吃菜；试安排人狼羊菜安全渡河。-In a shore of the river, people, wolves, sheep, vegetables, to cross the river, boats need someone to plan, and set out up to one thing, when the person is not, the wolf will eat the sheep,