Hotter Colder

The children's game Hotter Colder is played as follows. While player A is out of the room, player B hides an object somewhere in the room. Player A then re-enters at position $(0,0)$ and visits various other positions around the room. Each time player A moves to a new position, player B announces "Hotter" if that position is closer to the object than the previous one, "Colder" if it is farther, and "Same" if the distance is unchanged.

Input consists of up to 50 lines, each containing an x, y coordinate pair followed by one of "Hotter", "Colder", or "Same". Each pair is a position within the room, which may be assumed to be a square whose opposite corners are $(0,0)$ and $(10,10)$.

For each line of input, print on its own line the total area of the region in which the object may lie, to two decimal places. If no such region exists, print 0.00.