m2.13

year = int(input("Year:"))

month=int(input("Month:"))

while(month<1 or month >12):

    month = int(input("Month:"))

leap = 0

if ((year & 3) == 0 and ((year % 25) != 0 or (year & 15) == 0)):

    leap=1

else:

    leap =0

if(month<7 and month%2==0 and month !=2):

    print("Days:30")

if(month>7 and month%2!=0):

    print("Days:30")

elif(month ==2 and leap ==1):

    print("Days:29")

elif(month==2 and leap ==0):

    print("Days:28")

else:

    print("Days:31")