Thank you for sharing your opinion on my last blog.
I decided to adopt an "open-then-rated" system.
I considered what kind of participants I'd like to honor the most. It was those who have strong confidence and eagerness to take part in contests, not those who care about their rating too much or think like "what if I can't solve a problem...".
Now it's time to determine the details of the new system. What I'm currently considering is the followings: