# coding: utf-8
#yuki_152
import math

def gcd(a, b):
 while b:
  a, b = b, a % b
 return a

L=int(raw_input())
L=L/4
sq=int(math.sqrt(L))
count=0
for n in xrange(1,sq+1):
 for m in xrange(n+1,sq+1):
  if (m-n)%2==0 or gcd(m,n)!=1:
   continue
  if L>0:
   l=2*m*(m+n)
   if l>L:
    break
   count+=1

print count