Thanks a million for your instant help ;)

Hello Codeforces, I got the below message from the system after yesterday's Educational Codeforces Round 72.

Attention!

Your solution 60112264 for the problem 1217F significantly coincides with solutions YangDavid/60108293, Return.Hao/60112264. 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.com/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.

In this contest, I use the template from https://loj.ac/submission/27031, to solve the problem F. As it's submission time(2017-10-07) is notably earlier than the contest time(2019-09-06), I firmly believe it can be a conclusive evidence that a coincidence has occurred due to the use of a common source published before the competition. Therefore, I appeal to valid my solutions for Educational Codeforces Round 72.

Thanks.