I wrote a solution to 295B... After getting wrong ans on test case 4 I tested my solution on Custom Innovation and it is showing the correct output for the 4th case.

I tested my code in ideone also. here is the ideone test. It produces correct output both on CUSTOM INVOCATION and on Ideone.

I can't figure out what is wrong with my submission. could somebody please help me?

Edit:

My bad. The participant's output is shown first. Which is wrong and I got WA. I thought that it is the Jury's output.

got Wrong answer on test 11 after rejudge 11857092

later just printed two digits after decimal point and got Accepted 11868319

I don't understand the reason... please explain