def num_happy_day():

    month = []
    day  = []
    num = 0

    for i in range(1,13):
        month.append(i)

    for i in range(1,32):
        day.append(i)
    
    for left in month:
        for right in day:
            if left == 2 and right == 29:
                break
            elif (left == 4 and right == 31) or (left == 6 and right == 31) or (left == 9 and right == 31) or (left == 11 and right == 31):
                break
            else:
                right_ten = right // 10
                right_digit = right % 10
                if left == right_ten + right_digit:
                    num += 1

    return num

print(num_happy_day())