days = [0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
ans = 0
def f(d):
    res = 0
    for s in str(d):
        res += int(s)
    return res

for i in range(1, 13):
    for j in range(1, days[i] + 1):
        if i == f(j):
            ans += 1
print(ans)