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from functools import cache
from utils import open_day
from subprocess import run, PIPE
monkeys = {}
with open_day(21) as f:
for line in f:
target, expr = line.rstrip().split(': ')
expr = expr.split(' ')
if len(expr) == 1:
expr = int(expr[0])
monkeys[target] = expr
ops = {
'+': lambda a, b: a + b,
'-': lambda a, b: a - b,
'*': lambda a, b: a * b,
'/': lambda a, b: a // b,
}
@cache
def eval_monkey(m):
expr = monkeys[m]
if isinstance(expr, int):
return expr
return ops[expr[1]](eval_monkey(expr[0]), eval_monkey(expr[2]))
print(eval_monkey('root'))
filename = '21.z3'
with open(filename, 'w') as f:
f.write(''.join(f'(declare-const {monkey} Int)\n' for monkey in monkeys.keys()))
for k, v in monkeys.items():
if k == 'humn': continue
if k == 'root':
print(f'(assert (= {v[0]} {v[2]}))', file=f)
continue
if isinstance(v, int):
print(f'(assert (= {k} {v}))', file=f)
else:
print(f'(assert (= {k} ({v[1]} {v[0]} {v[2]})))', file=f)
print('(check-sat)\n(get-value (humn))', file=f)
r = run(['z3', filename], stdout=PIPE)
print(r.stdout.splitlines()[1].decode().strip('()').split()[1])
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