It took minimal feedback during 1-2h long sessions. It took some time, but it didn’t pester me with questions constantly, and I couldn’t believe it when I saw it working.
In just a few weeks, the four astronauts will be strapped into a spacecraft, perched on the top of the rocket, ready to blast off to the Moon.
，更多细节参见新收录的资料
Winningest winner: Olivia Dean
der(~R) = complement of der(R)