I can't understand what precision is needed for answer? According to sample test it is 0.1.. but I think my solution should work, but it's getting WA..

"The second line contains ε ≥ 0.0001 — the radius of the dot (the dot is essentially a small circle)."
So precision should be 1e-4

thanks, but I still can't understand why it can't be more than needed..:-)

Thanks again, got AC :-)