Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
One example: THEM: i need the hats and the ball  YOU: i can give you one hat and the ball. i want 2 books and 1 hat  THEM: i have to have both hats and the ball or both hats and a book to make a deal  YOU: sorry, i won`t make a deal without a hat  THEM: if you take 1 hat i have to have everything else  YOU: sorry can`t do  THEM: no deal  YOU: yesh no deal, sorry  THEM: no deal  YOU: no deal.
Solution is here: No
Explanation: Both participants do not agree to the deal, so the answer is No.

Now, solve this: THEM: i'll take the books. you can have the rest.  YOU: ok, but just to avoid getting the system warning i'm going to pretend to disagree. i disagree!  THEM: ah ok. well then i disagree ; )  YOU: haha ok, so you just want the books? because that works for me.  THEM: yes  YOU: cool, it's a deal.
Solution:
Yes