Григорьев ЛР / 4 / тп4_2_18

def mont_days(month):
    if month<1 or month>12:
        return(0)
    elif month in [1,3,5,7,8,10,12]:
        return(31)
    elif month in [4,6,9,11]:
        return(30)
    else:
        return(28)
month=int(input())
print(mont_days(month))