s=input().split()
a=int(s[0])
b=int(s[1])
if a%100!=0 and a%4 == 0 or a%400==0:
    if b== 1 or 3 or 5 or 7 or 8 or 10 or 12:
        print('31')
    elif b == 4 or 6 or 9 or 11:
        print('30')
    elif b == 2:
        print('29')
else:
    if  b== 1 or 3 or 5 or 7 or 8 or 10 or 12:
        print('31')
    elif b == 4 or 6 or 9 or 11:
        print('30')
    elif b == 2:
        print('28')