Crossing a river with tiger, goat and grass
What is situation?
1. First he need to carry a goat across the river. Tiger won't eat a bundle of grass.
2. Then he should take a tiger (or a grass bundle) across the river.
4. Now he should leave a goat behind & take a grass bundle (or a tiger) with him across the river.
5. Finally he has to take the goat across the river in last round.
