dk = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
s=0
for m in range(1, 13):
    for d in range(1, dk[m]+1):
        if sum(map(int, str(d)))==m:
#            print "%d/%d" % (m, d)
            s+=1
print s