ans = 0
for m in range(1, 12):
    if m in {1, 3, 5, 7, 8, 10, 12}:
        d = 31
    elif m == 2:
        d = 28
    else:
        d = 30

    for i in range(1, d + 1):
        if m == sum(map(int, list(str(i)))):
            ans += 1

print(ans)