M = list(range(1, 13))
D = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

C = 0
for m in M:
    for d in range(D[m]):
        if d < 10 and m == d:
            C += 1
        elif d >= 10 and int(str(d)[0]) + int(str(d)[1]) == m:
            C += 1
print(C)