A, B = map(int, input().split())

rrrrr = 3

if B >= 25:
    rrrrr -= 3
    print(rrrrr)
elif B>= 24:
    rrrrr -= 2
    print(rrrrr)
elif B >= 23:
    rrrrr -= 1
    print(rrrrr)
else:
    print(rrrrr)