[iironiic]

@leonid: I got an answer to #80 but I don't understand why it's not the correct answer. Can you help me figure out the problem in my code?

Just to see if there is something wrong in my code, I tried using my program to help me determine some values. Let's define the digital sum of the first 100 digits of radical n to be f(n).

Are these values correct? I chose a few test numbers just to see if my program is telling me the right digital sum. It did tell me that f(2) = 475 which was given in the problem.

f(3) = 441
f(7) = 398
f(35) = 440
f(69) = 439
f(95) = 460

Any help would be appreciated. Thanks!