LTIME75 had some server issues lately, but regardless, it doesn’t explain this outcome. Here are two IDENTICAL submissions in the span of 1 minute during the last 2 minutes of the contest.
Solution 1 (WA) : https://www.codechef.com/viewsolution/26187936
Solution 2 (AC) : https://www.codechef.com/viewsolution/26188072
Had it even been TLE/RTE instead of AC, It would have been possible that due to server load, it gave different runtime verdicts. But AC and WA cannot be explained except if the Test Cases were changed DURING THE LAST MINUTE which seems ridiculous. Hence this is sort of a bug report and also a Far Cry for help coz I had accidentally submitted that same solution in a hurry to get it submitted within time and had I only submitted the first solution, I was sure to get a much higher rank and a negative delta rating change . @admin Please look into this matter if possible