There is a square with seven monkeys on the floor and seven bananas on the top. Seven ladders go up the square, from one monkey to the banana over it, and the monkeys can climb them. Moreover there are some ropes which connect the ladders.

A monkeys will go up towards the bananas, but whenever it meets a rope it cannot resist the temptation to hang on it. Prove that every monkey will reach a banana, no matter the configuration of ropes.

There are at least two different solutions to this.

There is a square with seven monkeys on the floor and seven bananas on the top. Seven ladders go up the square, from one monkey to the banana over it, and the monkeys can climb them. Moreover there are some ropes which connect the ladders.

A monkey will go up towards the bananas, but whenever it meets a rope it cannot resist the temptation to stray and hang on it. Prove that every monkey will reach a banana, no matter the configuration of ropes.

There are at least two different solutions to this.