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'd like the book and 1 hat.  YOU: i will give you three balls  THEM: balls are 0 for me.  YOU: how about one hat?  THEM: i can do both hats or 1 book and 1 hat.  YOU: how about one of each?  THEM: balls are 0 for me.  YOU: well the best i can do is give you two hats and one ball  THEM: i just want the two hats. balls are 0 for me.  YOU: i can only spare one hat  THEM: you just offered 2 hats.  YOU: so you want just two hats?
Solution:
Yes