# -*- coding:utf-8 -*-
import math

def euclidean(n,m):
	while 1:
		if max(n,m) % min(n,m) == 0:
			return min(n,m)
		if n > m:
			n = n % m
		else:
			m = m % n

if __name__ == "__main__":
	l = input()
	l = l / 4
	ans = 0
	for i in xrange(1,int(math.sqrt(l))):
		for j in xrange(1,i):
			if (i-j) % 2 != 1:
				continue
			elif euclidean(i,j) != 1:
				continue
			else:
				if 2 * i **2 + 2 * i * j <= l:
					ans += 1
	print ans