Received a message saying my code of 1517C coincided with someone else's, what should I do?

Difference between en1 and en2, changed 12 character(s)

I took part in the Codeforces round yesterday, and just now I received a message saying my code coincides with someone else's. I didn't know the person at all. I solved the problem a lot earlier than him, and I didn't share my code to anyone or anywhere. I think it's just a coincidence because the solution is short and the code is simple. Could you please take a look into this?[user:MikeMirzayanov,2021-04-24]↵
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