Submission ID 7846927 (not my source, found online) gets Accepted but on this test it prints nan:

2 4 0
3 6 0
0 0 0
3

I'm pretty sure the test is correct (I plotted it). It's a sphere with center in origin and two points co-linear with the center which lie outside the sphere.

Submission ID 7846930 (also found online) also gets Accepted despite printing nan on the test above.

Edited by author 12.04.2018 03:03

Edited by author 12.04.2018 03:08

Thanks! The bunch of tests of similar pattern has been added.