l,r = map(int,input().split())

if l <= 295:
    if r <= 295:
        print(0)
    elif r >= 417:
        print(2)
    else:
        print(1)
elif l <= 416:
    if r <= 295:
        print(1)
    elif r >= 417:
        print(1)
    else:
        print(0)
else:
    if r <= 295:
        print(2)
    elif r >= 417:
        print(0)
    else:
        print(1)