Documentation

>>> :main
392043
1605968119

Return the median of an odd-length list

>>> median [1,2,0]
1

Either find the first unexpected bracket, or return the expected sequence of closing characters.

>>> validate [] "{([(<{}[<>[]}>{[]{[(<()>"
Left '}'

>>> validate [] "[({(<(())[]>[[{[]{<()<>>"
Right "}}]])})]"

Return the character that closes this bracket, if there is one.

Compute the part 2 cost of the expected tail.

>>> cost2 "}}]])})]"
288957