The old tests were quite weak. Thanks to anus(USU) for new tests.

Problem has been rejudged, 271 authors lost AC verdict.

Edited by author 14.12.2006 11:56

Could you please tell  what kind of tests were added?
1. Can the dart now be moving in the same plane where the circle is situated? If so, should we consider the hit?
2. If the dart hits just the boundary - not the inner part, is it a hit or not?
3. What about the precision - for calculation of the equation roots? Is Real type enough in pascal. Or should I use double?

Read the problem statement.

It is a hit if and only if the dart hits inner part of the board (both in the case of the same plane and another case).

Double type is enough for all calculations in this problem.
Correct solution should not have problems with precision.