class Player:
    def __init__(self, name):
        self.name = name
        self.level = 1
        self.exp = 0

    def gain_exp(self, amount):
        self.exp += amount
        if self.exp >= 100:
            self.level += 1
            self.exp = 0


player = Player("Hero")
player.gain_exp(120)

print("레벨:", player.level)
print("경험치:", player.exp)