cnt = 0
dm = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
for m in range(12):
    for d in range(dm[m]):
        x = m + 1
        y = d+1
        yy = [int(i) for i in list(str(y))]
        if x == sum(yy):
            #print(x, y, yy)
            cnt += 1
print(cnt)