#!/usr/bin/python
from fractions import gcd

L = int(raw_input())
res = 0
M = int((L/8)**.5)
for n in xrange(1, M+1):
    for m in xrange(n+1, M+1, 2):
        if gcd(m, n) == 1:
            if 8 * m * (m + n) > L:
                break
            res += 1
print res