WA in CS345A1 problem

[laveshkaushik]

hello,
i am using c++ for this http://www.spoj.com/problems/CS345A1/ problem.
i have checked my solution for many cases but i'm not able to find out where i'm going wrong.
Code :
http://ideone.com/8FCIdS

[leppyr64]

yy1=y1*10000000;
yy2=y2*10000000;
xx=x*10000000;

Why do you think that this is accurate?