HI Great Helpers of CF!!!

I am getting WA for Several Times to solve this problem . Please help me out.

Problem Link : http://www.spoj.com/problems/HAMSTER1/en/

This is Ternary Search Problem . I got the Sample Test Correct . But I am failed to find out the Error . May be It could be a Error of my TS process .

Here is My Code : http://pastebin.ubuntu.com/15525055/

I got my Ternary Search Idea from this Blog : http://codeforces.com/blog/entry/11497

And I modified a little to get the answers for Floating point Values . It would be a great Help if someone help me out .

Thanks in Advance .