- Many people don't like D, and I'm the same, because most people pass by writing brute force to find patterns. I gave feedback, but 74 ignored it.
- The description of F is particularly verbose, I suggest adding a formalized problem statement, but 74 also ignored it.
- G was also an original problem before, it was a JOISC problem, I found it about a week before the contest, and then replaced it with this question.
- The responsibility for H should not be borne by the question setter, the coordinator should be responsible for checking for duplicates and other miscellaneous matters, otherwise what is the purpose of the coordinator's existence?
- Not responding to the tester's feedback, and not caring about checking for duplicates in the questions, and even did not prove the solution before the contest. This is 74.