mirror of
https://github.com/bertptrs/adventofcode.git
synced 2025-12-25 21:00:31 +01:00
67 lines
1.6 KiB
Python
67 lines
1.6 KiB
Python
from __future__ import print_function
|
|
import fileinput
|
|
import re
|
|
import sys
|
|
|
|
recipe = {}
|
|
values = {}
|
|
|
|
def findValue(node):
|
|
match = re.search(r"\d+", node)
|
|
if match:
|
|
return int(match.group(0))
|
|
|
|
if node in values:
|
|
return values[node]
|
|
|
|
if node not in recipe:
|
|
sys.exit("Node without recipe '" + node + "'")
|
|
|
|
valueA = None
|
|
valueB = None
|
|
if recipe[node][0]:
|
|
valueA = findValue(recipe[node][0].strip())
|
|
if recipe[node][2]:
|
|
valueB = findValue(recipe[node][2])
|
|
|
|
action = recipe[node][1]
|
|
value = None
|
|
if action == "RSHIFT":
|
|
value = valueA >> valueB
|
|
elif action == "LSHIFT":
|
|
value = (valueA << valueB) & 0xffff
|
|
elif action == "NOT":
|
|
value = (~valueB) & 0xffff
|
|
elif action == "IS":
|
|
value = valueA & 0xffff
|
|
elif action == "AND":
|
|
value = valueA & valueB
|
|
elif action == "OR":
|
|
value = valueA | valueB
|
|
else:
|
|
sys.exit("Unsupported command " + action)
|
|
|
|
values[node] = value
|
|
return value
|
|
|
|
opPattern = re.compile(r"(\w+ )?(RSHIFT|LSHIFT|NOT|AND|OR) (\w+) -> (\w+)")
|
|
valuePattern = re.compile(r"(\w+) -> (\w+)")
|
|
|
|
for line in fileinput.input():
|
|
match = valuePattern.match(line)
|
|
if match:
|
|
recipe[match.group(2)] = (match.group(1), "IS", "")
|
|
else:
|
|
match = opPattern.match(line)
|
|
if match.group(4) in recipe:
|
|
sys.exit("Node with multiple recipes")
|
|
|
|
recipe[match.group(4)] = (match.group(1), match.group(2), match.group(3))
|
|
|
|
a = findValue("a")
|
|
|
|
print("Initial a is ", a)
|
|
values = {}
|
|
values["b"] = a
|
|
print("Secondary a is", findValue("a"))
|