OJ Board

1. Totally agree with Destination Goal's post.
2. To add: output of superfluous minus before zero ("-0.0") gets WA, which is bad as well


Here are some test cases that could help.

10 10 10.0000001 10 20 10 20.0000001 10
10 10 10.00000001 10 20 10 20.00000001 10
0 1 1 0 0 -1 -1 0
1 1 -1 -1 2 2 -2 ...