Hello, this blog is just my suggestion, please don't downvote me.
These days, Codeforces round problem have too much observation problem and little algorithms problem.
Please authors, can we have more less observation, less constructive algorithm and more algorithms round :)
P/s: This is just my suggestion, if it is not good, please don't downvote me.
Usually higher rated problems are more algorithms based and lower rated ones are more adhoc, this is done because it's difficulty to make easy algorithm problems that aren't too easy.
alt for minus contribution????