Teacher: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Teacher: Now, understand the problem? If you are still confused, see the following 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: No
Reason: Both participants do not agree to the deal, so the answer is No.

Now, solve this instance: THEM: i'd like the ball and the books ; are the hats of any value to you?  YOU: could you trade a hat for the ball?  THEM: ball is the highest value item. ; the only way i can get rid of the ball is for everything else on the table.  YOU: ok, well books aren't worth anything for me so i'll take just the hats  THEM: kind of figured that, compromising isn't fun sometimes : ) - - if you're ok with that i do appreciate it.  YOU: no worries, this works for me.
Student:
Yes