I was solving Div.2 114A. I have used the log function to solve this problem and repeatedly get wa for the 9th test case. I got the correct answer for that test case in codeblocks and idone but I got wrong answer for that test case in codeforces. My question is does the log function not always give the correct value or does the answer vary from compiler to compiler? Submitted code : https://codeforces.net/contest/114/submission/85798651

Thank you.