L, R = map(int, input().split())
ans = 0
if L <= 295:
    if R <= 295:
        print(0)
    elif R <= 416:
        print(1)
    else:
        print(2)
elif L <= 416:
    if R <= 416:
        print(0)
    else:
        print(1)
else:
    print(0)