THE QUESTION (not really required) http://www.spoj.com/problems/BLMIRINA/1 MY ANSWER http://ideone.com/SbYs7J PROBLEM the answer should be 6 decimal places , for the TEST CASE 1 179 56 56 ACCEPTED ANSWER = 147.084601 102.015294 MY ANSWER = 147.084593 102.015289 As you see , it is only a minute difference and depends on technique used for solving a problem...any suggestions to get around it .