In grad school (for math) I used to procrastinate by doing Project Euler problems. I've got that bad habit under control since then (for example, logging in jus

In grad school (for math) I used to procrastinate by doing Project Euler problems. I've got that bad habit under control since then (for example, logging in just now, the site told me I haven't done a problem in 56 days!), and am currently at 322 (https://projecteuler.net/profile/oantolin.png https://projecteuler.net/profile/oantolin.png). Don't get sucked in!