Using debug submits i found that in test #7 there are situation where the phone selects most powerful station being on the signal change curve. I fixed this situation but now i'm getting OLE on test 7? What does it mean? I don't output infinite amount of data.

I think there is some bug in test #7. Because in the statement (at least in english version) is said, that Shpuntik never went by tangent of signal changing curves. So i didn't care about touching case. But when i got several WA's and OLE's on test 7 i made my program not consider touch as intersection. And got AC.