B12 - Equation

提出

code: python

import math

n = int(input())

# x は実数

# 0.000 < x < 100.000

# O(pow(10, 9))

l = 0.000000

r = 100.000000

while l < r:

mid = (l+r) // 2

ans = mid**3 + mid

if ans > n:

r = mid - 1

else:

l = mid + 1

print(l)

解答

code: python

n = int(input())

l = 0.0

r = 100.0

for i in range(20):

mid = (l + r) / 2

val = mid**3 + mid

if val > n:

r = mid

else:

l = mid

print(mid)