题解 | #求解立方根#

while True:
    try:              
        n=float(input())
        if n>=0:
            out=n**(1/3)
            out=format(out,'.1f')
        else:
            out=(-n)**(1/3)
            out=format(-out,'.1f')
        print(out)
    except:
        break