Day 3: Mull It Over
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View all comments 2 points
Python
def process(input, part2=False):
if part2:
input = re.sub(r'don\'t\(\).+?do\(\)', '', input) # remove everything between don't() and do()
total = [ int(i[0]) * int(i[1]) for i in re.findall(r'mul\((\d+),(\d+)\)', input) ]
return sum(total)
Given the structure of the input file, we just have to ignore everything between don’t() and do(), so remove those from the instructions before processing.
2 points
Sub was my first instinct too, but I got a bad answer and saw that my input had unbalanced do/don’t.
2 points
