class Run:
    def __init__(self,weight,eat_num,run_num):
        self.weight=weight
        self.eat=0.5
        self.running=1
        self.eat_num=eat_num
        self.run_num=run_num

    def reweight(self):
        return self.weight-self.running*self.run_num-self.eat*self.eat_num

xiaoming=Run(75,5,5)
xiaomei=Run(45,5,5)
print(f"小明跑完步体重{xiaoming.reweight()}")
print(f"小美跑完步体重{xiaomei.reweight()}")