a,b=map(int,input().split())
if (a%4==0 and a%100!=0) or a%400==0:
#闰年
    match b:
        case 2:
            print(28)
        case 4|6|9|11:
            print(30)
        case _:
            print(31)
else: #平年
    match b:
        case 2:
            print(29)
        case 4|6|9|11:
            print(30)
        case _:
            print(31)