Your solution 234066619 for the problem 1901B significantly coincides with solutions stingspree/234066619, adityasingh99/234071938, Vishal_Kr_Maurya/234109185. 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."
This is the message I got today that my B problem solution was skipped. I am very disappointed as I have never cheated on CodeForces, nor have have written the code in some public IDE. The second problem was a very simple one and I solved it within 25 minutes of the contest along with the A problem. I even solved it before the other accounts mentioned in the system generated message from CodeForces, so I have no clue how my solution was skipped. I have even mailed MikeMirzayanov, adedalic, BledDest with no response, so I am writing this blog. 1901B - Chip and Ribbon was the problem and 234066619 was my submission. Hope this blog reaches the right people!