year,month=map(int,input().split())
if month in (1,3,5,7,8,10,12):
    day=31
    print(day)
elif month in (4,6,9,11):
    day=30
    print(day)
elif month==2:
    if year%400==0 or(year%4==0 and year%100!=0):
        day=29
        print(day)
    else:
        day=28
        print(day)
/**************************************************************
	Problem: 1825
	User: admin
	Language: Python
	Result: Accepted
	Time:305 ms
	Memory:34480 kb
****************************************************************/