import math

def tret_koren(x):
    if 0<=x: return int(x**(1./3.))
    else: return int(-(-x)**(1./3.))

def cube(i):
    return i**3

m=input()
n=input()
x=input()
#vasiot kod pisuvajte go tuka
tablica={}

if x>int(n):
      print("nema podatoci")
      for i in range(int(m),int(n+1)):
      		tablica.update({cube(i):i})
      print (sorted(tablica.items()))

else:
      print(tret_koren(x))
      for i in range(int(m),int(n+1)):
      		tablica.update({cube(i):i})
      print (sorted(tablica.items()))