小南解题--调和数列问题--114ms

x=1

aa=[]

n=1

while True:

    aa=[]

    n=1

    x= float(input())

    if x==0:

        break

    else:

        while sum(aa)<x:

            aa.append(1/(n+1))

            n+=1

        print(n-1,'card(s)')