cnt=0
for m in range(1,13):

    for ten in range(4):
        one=m-ten
        dey=ten*10+one
        if one>=0 and one<10 :
            if (m in[1,3,5,7,8,10,12]) and dey<=31:
                cnt=-~cnt
            elif(m==2) and dey<=28:
                cnt=-~cnt
            elif dey<=30:
                cnt=-~cnt
            
print(cnt)