lines = open("input.txt", "r").read().splitlines()


class Monkey:
    def __init__(self, name=None, number=None, childA=None, childB=None, op=None):
        self.name = name
        self.number = number
        self.childA = childA
        self.childB = childB
        self.op = op

    def yell(self):
        if self.number != None:
            return self.number
        else:
            if self.name == "root":
                return monkeys[self.childA].yell() == monkeys[self.childB].yell()
            if self.op == "+":
                return monkeys[self.childA].yell() + monkeys[self.childB].yell()
            elif self.op == "-":
                return monkeys[self.childA].yell() - monkeys[self.childB].yell()
            elif self.op == "*":
                return monkeys[self.childA].yell() * monkeys[self.childB].yell()
            elif self.op == "/":
                return monkeys[self.childA].yell() / monkeys[self.childB].yell()


monkeys = {}

for line in lines:
    name = line.split(" ")[0][:-1]
    rest = line.split(" ")[1:]
    if len(rest) == 1:
        monkeys[name] = Monkey(name=name, number=int(rest[0]))
    else:
        childA = rest[0]
        childB = rest[2]
        op = rest[1]
        monkeys[name] = Monkey(name=name, childA=childA, childB=childB, op=op)