Your solution 237987568 for the problem 1914C significantly coincides with solutions heckeruwuu/237986714, MayureshRajput/237987568, 2110030317/237990906, INChiranjeevi/238009217, Amulya_Lasker/238017715, 2110030249_Tharun/238024107, CMRIT2025_21R01A0514/238026695, 21r01a0574/238026972, 227r1a7325/238034984, Vedantham_Sriharsha/238040508, Ramuyadav/238041114. Such a coincidence is a clear rules violation. Note that unintentional leakage is also a violation. For example, do not use ideone.com with the default settings (public access to your code). If you have conclusive evidence that a coincidence has occurred due to the use of a common source published before the competition, write a comment to post about the round with all the details. More information can be found at http://codeforces.net/blog/entry/8790. Such violation of the rules may be the reason for blocking your account or other penalties. In case of repeated violations, your account may be blocked.

I received this surprising message today. I don't know who all they the system mention and I didn't use any online IDE. In fact, this is a quite easy problem as C for Div.3,and its just a coincidence I code in python . Please check this blog MikeMirzayanov.