"Attention!

Your solution 148897942 for the problem 1650G significantly coincides with solutions Remaker233/148891061, ZBHRuaRua/148897942. 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.ml/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."

The system told me that I cheated because of my Problem G solution in Round #776 coinciding with others. However, this problem had a same version on http://poj.org/problem?id=3463 ,and I had finished the problem with the help of a blog https://www.cnblogs.com/xingxing1024/p/5224363.html which was posted in 2016.So I use the code to finish problem G.Is it illegal?

It's a 200 rating change and I am skipped ,very upset:(