题解 | #求解立方根#

#硬解
while True:
    try:
        n = float(input())

        dict = {}

        for i in range(-200,201):
            d = abs((i/10)**3 - n)
            dict[i/10] = d

        a = min(dict, key=dict.get)

        print("%.1f"%a)

    except:
        break