# coding: utf-8
# Here your code !
count = 0
day31 = [1,3,5,7,8,10,12]

for i in range(1,13):
    if i == 2:
        for j in range(1,29):
            if i == sum([int(k) for k in str(j)]):
                count += 1
    elif i in day31:
        for j in range(1,32):
            if i == sum([int(k) for k in str(j)]):
                count += 1
    else:
        for j in range(1,31):
            if i == sum([int(k) for k in str(j)]):
                count += 1
                
print(count)