ans = 0
d = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
for i in range(1, 13):  # i:manth
    day = d[i-1]        # day: lastday for the manth
    for j in range(1, day): # j: the day 
        if i == sum(int(_) for _ in list(str(j))):
            ans += 1
print(ans)