题解 | #求解立方根暴力遍历！！还有谁？？？
求解立方根
https://www.nowcoder.com/practice/caf35ae421194a1090c22fe223357dca?tpId=37&tqId=21330&rp=1&ru=/exam/oj/ta&qru=/exam/oj/ta&sourceUrl=%2Fexam%2Foj%2Fta%3Fpage%3D3%26tpId%3D37%26type%3D37&difficulty=undefined&judgeStatus=undefined&tags=&title=
num_float=float(input())
num_1f=0.1
num_2f=-0.1
error=0
while 1:
if num_float==0.0:
print('0.0')
elif num_float>0:
error=num_float-num_1f**3
if num_float-num_1f**3<0:
if num_1f**3-num_float > num_float-(num_1f-0.1)**3:
num_1f=num_1f-0.1
print(round(num_1f,1))
break
else:
num_1f+=0.1
elif num_float<0:
if num_float-num_2f**3>0:
if num_float-num_2f**3 > (num_2f+0.1)**3-num_float:
num_2f=num_2f+0.1
print(round(num_2f,1))
break
else:
num_2f-=0.1
