def lang(x):
	CPP, RUST, PYTHON = 0, 1, 2
	
	if x <= 295:
		return CPP
	elif 417 <= x:
		return PYTHON
	else:
		return RUST

def main():
	L, R = map(int, input().split())
	ans = lang(R) - lang(L)
	print(ans)

if __name__ == "__main__":
	main()