y,m = map(int,input().split())

if m == 2:

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

else:

if m == 1 or 3 or 5 or 7 or 8 or 10 or 12:
    print('31')
else:
    print('30')