import sys
sys.setrecursionlimit(10**7)
def ii(): return int(input())
def ist(): return input().split()
def mi(d=0): return map(lambda x:int(x)-d,input().split())
def lmi(d=0): return list(map(lambda x:int(x)-d,input().split()))
INF = float("inf")
def answer(s):
  print(s)
  exit()
################################################
l,r = mi()
if l <= 295:
  if r <= 295:
    answer(0)
  elif r <= 416:
    answer(1)
  else:
    answer(2)
elif l <= 416:
  if r <= 416:
    answer(0)
  else:
    answer(1)
else:
  answer(0)