Instructions

There are two periods, you can buy one item in each period from a robot seller.
Originally your account has 100 points. Your total points increase by the value of the item if you get it.
Your total points decrease when you pay some points to the seller.

Basic information

At the beginning of the each period, both you and the robot seller know the possible outcome of your value.
Robot seller will set a secret price based on the possible outcome for each period.
Secret price in period 1 might be different from secret price in period 2.
The cost of producing the item for the seller is zero.

But only you know your true value when you enter the market.
You have to make a bid in each period if you are in the market.

About the Secret price

You can get the item only when your bid is not the less than the secret price in each period.
You need to pay the secret price if you can get the item.