from math import sqrt, log10


def newton(a, n = 2):
  x = 0
  x_ = int(sqrt(a))
  if x_ ** n == a:
    return x_
  while abs(x - x_) > 1:
    x = x_
    tmp = x ** (n - 1)
    x_ = x - (tmp * x - a) / tmp / n
    x_ = int(x_)
  while x ** n > a:
    x -= 1
  return x


def numsum(x):
  total = 0
  while x != 0:
    total += x % 10
    x /= 10
  return total


def main(maxx):
  ss = 0
  for i in xrange(maxx + 1):
    if int(sqrt(i)) ** 2 == i:
      continue
    tmp = newton(i * 100 ** 99)
    ss += numsum(tmp)
        print ss