In the Div-2 Educational codeforces contest held recently, I got AC for problem B(Shifts and Sorting) in the Pre-tests and even during hacking. But after system testing, my code got reviewed as a compilation error on the first test case itself. I submitted the same code again just now and it got AC twice(Once I submmited directly in Codeforces and another time, I uploaded the original Java file again from my local system). I have now as a result ended up with a significant negative delta rating instead of the expected positive delta I was predicted to get. Could anyone please tell if something can be done or what I should do?

Submission file which got CE: https://codeforces.net/contest/1969/submission/258721596

Same exact code which got AC: https://codeforces.net/contest/1969/submission/258860631