Last div 4 contest all of my submission got skipped. But i did nothing wrong. I did not violate any rules of codeforces. But the system is telling me that "Your solution 156710964 for the problem 1676G significantly coincides with solutions Tapojit047/156689457, Mr_Frodo/156710964, rifatentr/156716498."

My solution : https://codeforces.com/contest/1676/submission/156710964

rifatentr solution : https://codeforces.com/contest/1676/submission/156716498

Tapojit047 solution : https://codeforces.com/contest/1676/submission/156689457

These three are totally different code. It was an easy problem, so most people will obviously solve it in almost same way. I don't even know them. Though it was not rated for me, I think codeforces plagiarism need to be check.