ans = 0
d = [0,31,28,31,30,31,30,31,31,30,31,30,31]
for i in range(1, 12+1):
    for j in range(d[i]):
        t = 0
        for c in str(j+1):
            t += int(c)
        if i == t:
            ans += 1
print(ans)