题解 | #求解立方根#

input_data = float(input())
if abs(input_data) < 1:
    len = 1
else:
    len = abs(int(input_data)) // 2
if input_data < 0:
    a = -10 
else:
    a = 10
data = list(x/a for x in range(1,len*10))
error = []
for i in data:
    error.append(abs(i**3 - input_data))

min_value = error[0]
min_index = 0
for index,value in enumerate(error):
    if value < min_value:
        min_value = value 
        min_index = index

print(data[min_index])