When playing some games, especially last night's Div.1 + Div.2 (which is too late for China), I often find that I cannot do all the questions I can in order. In other words, I may not be able to make B, but I can make C. So I am considering whether I should start writing from question A or go through the questions first and start writing from the last question I know to the first question? Should we work hard or continue to work on the next question that we couldn't come up with after thinking for 10 minutes?

Also, has CodeForces considered hosting any other competitions at other times? Although this question has been around for a long time, I still want to ask (sorry)