binary-chainfinder-pyth-explanation.txt

DtHIqH18R0IqH13R1K0FbjH2=+K-4b)RtKJsmtdr1QJ-QJ
DtH                                             Define method t with argument H
   IqH18                                          If H is equal to 18
        R0                                          Return 0 (implicitly ends If block)
          IqH13                                   If H is equal to 13
               R1                                   Return 1
                 K0                               Set variable K to 0
                   Fb                             For every value in 'jH2', set variable b to that value and execute block
                     jH2                                   Convert H to base 2 as an array of integers
                        =+K                         Set K to K + '-4b'
                           -4b                      4 minus b
                              )                   End for loop
                               RtK                Return t(K). Implicitly ends function definition
                                  J               Set J equal to:
                                   s                The sum of all integers in:
                                    m                 Map a set of values (second arg) using a lambda with parameter named d (first argument)
                                     td                 lambda d: t(d)
                                       r1Q              A range from 1 to Q. Q is automatically set to stdin evaluated
                                          J       Implicitly print J
                                           -QJ    Implicitly print the result of subtracting J from Q