days_2015 = []

for i in range(12):
    for j in range(31):
        days_2015.append((i+1,j+1))
days_2015.remove((4, 31))

Happy_days = []

def happy_check(i,j):
    # jの１０の位
    a = j // 10
    # jの１位
    b = j - a*10
    if i == a+b:
        Happy_days.append((i,j))

for day in days_2015:
    i = day[0]
    j = day[1]
    happy_check(i,j)

print(len(Happy_days))