111 - ZOJ Monthly, October 2011 - B
It is a non-cover container, the upper part of it is a cylindrical surface which radius is R and hight is H, the lower part of it is a round table of upper radius R and under radius r, height h, r < R.
There are multiple cases. Each case is only one line containing the given volume.
Each output contains one floating number indicationt the minimum surface area. Round to six digits behind the decimal point.
Author: HE, Ningxu