题解 | #求解立方根#
求解立方根
https://www.nowcoder.com/practice/caf35ae421194a1090c22fe223357dca
src = float(input().strip())
croot = 0
eps = 1e-6
left, right = -3, 3
while abs(croot ** 3 - src) >= eps:
c3 = croot ** 3
if c3 < src:
left = croot
croot = (right + croot) / 2
else:
right = croot
croot = (croot + left) / 2
print(f"{croot:.1f}")
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