daycounts = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
cnt = 0

for i, md in enumerate(daycounts):
    for d in range(md):
        if (i + 1) == (d % 10) + (d // 10):
            cnt += 1
print(cnt)