@ASMA,
Cannibal goes over with a monkey....Cannibal gets back on boat, Monkey gets dropped off... (3 C, 2 M)
Two monkeys get in boat, drops one off, one goes back...(3 C, 1 M)
Two cannibals get in boat, and go over...1 C, and 1 M each get in and come back...(2 C, 2 M)
Two cannibals get in boat and go over, and get out...(3 C, 1 M) (on shore)
Monkey comes back ( 3 C 0 M) and gets one monkey at a time (3 C, 3 M)