题解 | #求解立方根#
求解立方根
https://www.nowcoder.com/practice/caf35ae421194a1090c22fe223357dca
def cube_root_newton(val, tolerance=1e-4):
x = val
while abs(x**3 - val) >= tolerance:
x = 2*x/3 + val/(3*x**2)
return round(x, 1)
# 读取输入
val = float(input().strip())
# 计算立方根并输出
print(cube_root_newton(val))
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