54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
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import math
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import re
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def main():
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with open("day14.txt", "rt") as input_file:
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lines = [line.rstrip() for line in input_file.readlines()]
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line_re = re.compile(r"(.+) => (.+)")
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raw_transmos = [line_re.match(line).groups() for line in lines]
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transmos = {}
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for inputs, outputs in raw_transmos:
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mult, result = outputs.split(" ")
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input_comps = [i.split(" ") for i in inputs.split(", ")]
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input_tuples = [(int(q), n) for q, n in input_comps]
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transmos[result] = int(mult), input_tuples
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print("Required ore for 1 FUEL:", get_required_ore(transmos, "FUEL", 1, {}))
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def get_required_ore(transmos, name, quantity, rabs):
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if name == "ORE":
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return quantity
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print("What is required for {} {}?".format(quantity, name))
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mult, comps = transmos[name]
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num_reactions = math.ceil(quantity / mult)
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created = 0
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if name in rabs:
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print(" Found {} in rab.".format(rabs[name]))
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created += rabs[name]
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rabs[name] = 0
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req_ore = 0
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for _ in range(num_reactions):
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if created >= quantity:
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break
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print(" Creation of {} {}...".format(mult, name))
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for rq, rn in comps:
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req_ore += get_required_ore(transmos, rn, rq, rabs)
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created += mult
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print(" Possessing {} {}.".format(created, name))
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if created > quantity:
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leftover = created - quantity
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rabs[name] = rabs.get(name, 0) + leftover
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print(" Stored {} {} in rab.".format(leftover, name))
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print("Answer ({} {}): {} ores".format(quantity, name, req_ore))
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return req_ore
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if __name__ == "__main__":
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main()
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