def new_input():
    total = []
    while True:
        unit= input("请输入：")
        if unit== 'q':
            break
        else:
            try:
               unit=int(unit) 
            except:
                print("请输入")
            else:    
                total.append(unit) 
    return total
def sum(money):
    count=0
    for i in money:
        count=count+i
    return count
a=new_input()
pay=sum(a)
print(pay)