POW 36

Three lions and three antelope are stranded on the east bank of a river and need to reach the west. A raft is available, which can carry a maximum of two animals at a time and needs at least one animal on-board to row it across (assume the animals can row). If the lions ever outnumber the antelope on either side of the river (including the animals in the boat if it's on that side), the lions will eat the antelope.

​Given these rules, how can all the animals make the crossing and survive?