Are four-year activities that important for HYPSM?
I am an international student and have seen many chance thread. I've noticed that most HYPSM chances have activities that last for four years (four year debate, four year community service, four year librarian, etc.) So are four-year activities compared to two-year or one-year activities that important in the application of top schools like HYPSM? What's the case for international students in particular (because in my country, students will finish junior high school (middle school) at grade 9 and start a different senior high school (high school) at grade 10, so most of activities are discontinued at that time)?