there are 3 explorers adn 3 cannibals. they all need to get to the other side of the river, they have 1 boat. all 3 explorers know how to row a boat adn only 1 cannibal knows how to row a boat. if at any time there are more cannibals than explorers on eaither side teh cannibals will eat the exploers, its ok to have an even amout. how do the all safly cross the river?