#!/usr/bin/env python

import re


def get_velocity_x(target):
	result = dict()

	for x in range(max(target[0], target[1])+1):
		result[x] = []
		pos = 0
		for i, speed in enumerate(reversed(range(x+1))):
			if (target[0] <= pos <= target[1]):
				result[x].append(i)
			pos += speed
	return result

def get_velocity_y(target):
	result = dict()

	min_y = min(target[2], target[3])
	for y in range(min_y, abs(min_y)+1):
		result[y] = []
		pos = 0
		i = 0
		speed = y
		while pos >= min_y:
			i += 1
			pos += speed
			#print("%d %d %d %d" % (y, pos, speed, i))
			if (target[2] <= pos <= target[3]):
				result[y].append(i)
			speed -= 1
	return result

def get_velocity_count(velocity_x, velocity_y):
	result = 0
	for y in reversed(velocity_y.keys()):
		for x in velocity_x.keys():
			sx = set(velocity_x[x])
			sy = set(velocity_y[y])
			if len(sx) == 0:
				continue
			if len(sy) == 0:
				continue
			s = sx.intersection(sy)
			if len(s):
				result += 1
				continue
			if velocity_x[x][-1] == x:
				t = [i for i in sy if i > x]
				if len(t):
					result += 1
				continue
	return result

with open("input01.txt","r") as f:
	line = f.readline()
	m = re.match(".*: x=(.*)\.\.(.*), y=(.*)\.\.(.*)", line.strip())
	target = [int(m.group(1)), int(m.group(2)), int(m.group(3)), int(m.group(4))]


velocity_x = get_velocity_x(target)
velocity_y = get_velocity_y(target)
result = get_velocity_count(velocity_x, velocity_y)
print(result)