days=[31,28,31,30,31,30,31,31,30,31,30,31]
count=0

for i in range(1,13):
    for j in range(1,days[i-1]+1):
        daysum=0
        while j!=0:
            daysum+=j%10
            j=int(j/10)
        if daysum==i:
            count+=1
print(count)