I was looking in the Codeforces Round 1065 (Div. 3) standings and I spotted a very suspicious user.

Their account is casualuse1045.

What's suspicious is that just 10 days before Codeforces Round 1065 he participated in Codeforces Round 1063 (Div. 2) solving 0 problems but in Codeforces Round 1065 (Div. 3) he solved all problems, and even in other div 2 contests he barely even solved 1 problem which is a really suspicious rise in solving ability in just 10 days and is impossible to attain by anyone.

Also in problem H and G he used

while (t--){
    function_name(); //just a placeholder
}

While in the other problems he used

while (t--){
    // all code in the while loop itself
}

Now both these things are really suspicious and the suggest that the code was copied from elsewhere. I think this account should be looked into by reirugan