a = 0
count = 10000
for x in range(10000):
    a = x
    st = list(str(a))
    for x in range(len(st)):
        if st[x] == '1':
            if (x+1) != len(st):
                if st[x+1] == '3':
                    print(st)
                    count-=1


print(count)