|
- from functools import lru_cache
-
-
- @lru_cache(maxsize=None)
- def fn(seed=None):
- instructions = map(str.split, text.replace(':', '').splitlines())
- while instructions:
- act, *instructions = instructions
- try:
- match act:
- case ['root', a, _, b] if seed is not None:
- return eval(a) - eval(b)
- case ['humn', _] if seed is not None:
- locals()['humn'] = seed
- case [name, a, x, b]:
- locals()[name] = eval(a + x + b)
- case [name, a]:
- locals()[name] = eval(a)
- case default:
- raise RuntimeError(default)
- except NameError:
- instructions.append(act)
- return int(locals()['root'])
-
-
- def bisect(fn, x1, x2):
- for _ in range(100):
- xn = x1 + (x2 - x1) // 2
- if fn(xn) == 0:
- return xn
- elif abs(fn(x1)) > abs(fn(x2)):
- x1 = xn
- else:
- x2 = xn
-
-
- text = open(0).read()
- print(fn())
- print(bisect(fn, 0, 10_000_000_000_000))
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