def digit_sum(n):
    res = 0
    while n > 0:
        res += n % 10
        n //= 10
    return res

eom = [31,28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

ans = 0
for m in range(1, 12+1):
    for d in range(1, eom[m-1]+1):
        if m == digit_sum(d):
            ans += 1
print(ans)