In A1:A9 a have some values that are either numbers, texts or blanks
In B1 I have =IF(COUNTIF($A$1:A1;A1)=1;1;0) which I copy down

This formula shows 1 when a value appears for the first time
0 when the value is blank or appears for
second, third... time

Finally, I add the range B1:B9 to count the number of different values
(not blank) that my range has.

My problem is:

I want to obtain the same sum with an array formula, without
intermediate results. No matter how hard I try, I am unable to get
get.

If possible, I'd like that the array formula resembles my original
formula =IF(COUNTIF($A$1:A1;A1)=1;1;0) .

Can anybody help?