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

if B == 2:

if A / 400 == 0 or (A % 4 == 0 and A % 100 != 0):
    print(29)
else:
   print(28)

elif B == 4 or B == 6 or B == 9 or B == 11:

print(30)

else:

print(31)