The statement describes the precision as 10^-9, but in the second example I see "1.41421356237309" This number has 14 digits behind decimal point. I tried submitting answers with precision 9, 14 and 16. They all WA#1 even though my calculations have to be correct. Does someone know what's the correct precision?

Edited by author 14.04.2016 15:20

Edited by author 14.04.2016 15:20

Are you using a high enough precision type? And hopefully don't output anything extra like "result="? Show your code or something.