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import sys | |
from operator import add, mul, sub, truediv | |
from re import split | |
from sympy import solve as sympy_solve | |
from sympy.abc import x | |
def solve(): | |
monkeys = {} | |
for line in sys.stdin: | |
match split(r":? ", line.strip()): | |
case [monkey, number]: | |
monkeys[monkey] = int(number) | |
case [monkey, arg1, operator, arg2]: | |
monkeys[monkey] = [operator, arg1, arg2] | |
print("Part 1:", int(resolve(monkeys, "root"))) | |
print("Part 2:", find(monkeys)) | |
def resolve(monkeys, monkey): | |
operations = {"+": add, "-": sub, "*": mul, "/": truediv} | |
match monkeys[monkey]: | |
case int(arg1): | |
return arg1 | |
case [operator, arg1, arg2]: | |
return operations[operator](resolve(monkeys, arg1), resolve(monkeys, arg2)) | |
def find(monkeys): | |
def build(monkey): | |
match monkey: | |
case "x": | |
return x | |
case int(monkey) | float(monkey): | |
return monkey | |
case [operator, *names]: | |
left, right = [build(monkeys[name]) for name in names] | |
return f"({left} {operator} {right})" | |
monkeys["humn"] = "x" | |
left, right = [build(monkeys[name]) for name in monkeys["root"][1:]] | |
return sympy_solve(f"Eq({left}, {right})", x)[0] | |
if __name__ == "__main__": | |
solve() |
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