ignore set* folders
ignore me
almost rewritten...
problem set number should be at least two digits
Create README.md
rewrite notebook.txt on each step
pretty print
validate user input
fix bug: previous records are disordered on rewrite
handle coworkers better
validate empty input
change prompt order
Update README.md
Update README.md
Update README.md
print aggregate in minutes and hours
sort aggregation by question number
Merge branch 'master' of https://github.com/fuqcool/CS5010
show response on each action
replace continuous space with single space