a = [1,3,5,7,8,10,12]
b = [4,6,9,11]
cnt =0
for m in range(1,13):
    if m in a:
        for d in range(1,32):
            s = str(d).zfill(2)
            if int(s[0])+int(s[1])==m:cnt+=1
    elif m in b:
        for d in range(1,31):
            s = str(d).zfill(2)
            if int(s[0])+int(s[1])==m:cnt+=1
    else:
        for d in range(1,29):
            s = str(d).zfill(2)
            if int(s[0])+int(s[1])==m:cnt+=1
print(cnt)