def ip():return int(input())
def mp():return map(int, input().split())
def lmp():return list(map(int, input().split()))
# 岩プロコン2 A No.3259 C++ → Rust → Python
L, R = mp()
if R <= 295 or (296 <= L and R <= 416) or 417 <= L:
  print(0)
elif (L <= 295 and 296 <= R <= 416) or (296 <= L <= 416 and 417 <= R):
  print(1)
else:
  print(2)