25 lines
712 B
Python
Executable File
25 lines
712 B
Python
Executable File
#!/usr/bin/python3
|
|
from pprint import pprint
|
|
import re
|
|
|
|
rules = {}
|
|
with open("input") as fh:
|
|
for ln in fh:
|
|
m = re.fullmatch(r"(.*) bags contain (.*)\.\n", ln)
|
|
container = m.group(1)
|
|
contents = {}
|
|
for c in m.group(2).split(", "):
|
|
if m := re.match(r"(\d+) (.*) bag", c):
|
|
contents[m.group(2)] = int(m.group(1))
|
|
assert container not in rules # Assume only one rule for each container
|
|
rules[container] = contents
|
|
|
|
def nr_contained_bags(color):
|
|
contents = rules[color]
|
|
sum = 0
|
|
for color2, count in contents.items():
|
|
sum += count * (1 + nr_contained_bags(color2))
|
|
return sum
|
|
|
|
print(nr_contained_bags("shiny gold"))
|