91 lines
2.7 KiB
Python
91 lines
2.7 KiB
Python
from lib import *
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data = open(0).read()
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part_2 = False
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if part_2:
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gates = {"b": 16076}
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else:
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gates = {}
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while "a" not in gates:
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for line in data.splitlines():
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lhs, rhs = line.split(" -> ")
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if part_2 and rhs == "b":
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continue
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lhs = lhs.strip()
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if "NOT" in lhs:
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op, op1 = lhs.split(" ")
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assert op == "NOT"
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try:
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op1 = int(op1)
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gates[rhs] = ~op1 & 0xffff
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except ValueError:
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if op1 in gates and isinstance(gates[op1], int):
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gates[rhs] = ~gates[op1] & 0xffff
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elif "OR" in lhs:
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op1, op, op2 = lhs.split(" ")
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assert op == "OR"
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try:
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op1 = int(op1)
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except ValueError:
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if op1 in gates and isinstance(gates[op1], int):
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op1 = gates[op1]
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try:
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op2 = int(op2)
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except ValueError:
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if op2 in gates and isinstance(gates[op2], int):
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op2 = gates[op2]
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if not (isinstance(op1, int) and isinstance(op2, int)):
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continue
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gates[rhs] = (op1 | op2)
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elif "AND" in lhs:
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op1, op, op2 = lhs.split(" ")
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assert op == "AND"
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try:
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op1 = int(op1)
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except ValueError:
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if op1 in gates and isinstance(gates[op1], int):
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op1 = gates[op1]
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try:
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op2 = int(op2)
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except ValueError:
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if op2 in gates and isinstance(gates[op2], int):
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op2 = gates[op2]
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if not (isinstance(op1, int) and isinstance(op2, int)):
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continue
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gates[rhs] = (op1 & op2)
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elif "LSHIFT" in lhs:
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op1, op, op2 = lhs.split(" ")
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op2 = int(op2)
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try:
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op1 = int(op1)
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except ValueError:
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if op1 in gates:
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op1 = gates[op1]
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else:
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continue
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gates[rhs] = (op1 << op2) & 0xffff
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elif "RSHIFT" in lhs:
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op1, op, op2 = lhs.split(" ")
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op2 = int(op2)
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try:
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op1 = int(op1)
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except ValueError:
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if op1 in gates:
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op1 = gates[op1]
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else:
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continue
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gates[rhs] = (op1 >> op2) & 0xffff
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else:
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try:
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lhs = int(lhs)
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gates[rhs] = lhs
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except ValueError:
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if lhs in gates:
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gates[rhs] = gates[lhs]
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print(gates["a"])
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