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Discussion of Problem 1412. Autumn Tide

Help!
Test :
1 2
1
1 0.5
Answer:
1.1339745962155616
Eternal, your test is incorrect, because the posts on the corners of stadium will not give to the person with umbrella to stand up in this point. Or I am wrong?

Edited by author 15.04.2011 20:02
test 28 is like that:
2 2
1
0 4

correct answer is 4.0
Just be careful with distances to borders :)
This test helped me:
1 1
1
-0.5 100