In today's contest Codeforces Round #706 Div.2 every time I am trying to submit, the judge is saying, I have submitted the same code before. In fact, I am changing the code in every way, tried even submitting through incognito but did not work. Here I am attaching the screenshot.

I have participated in #636 Div 3 and successfully answered the first question. But in my profile, I am still unrated and also in the contest section it is showing that I have not participated in any contested. It has been already 15 hours after the contest.