A=[0,31,28,31,30,31,30,31,31,30,31,30,31]

ANS=0

for i in range(1,13):
    for j in range(1,A[i]+1):
        sc=0
        for k in str(j):
            sc+=int(k)

        if i==sc:
            ANS+=1

print(ANS)