Trying to find all repeat data in a column with about 200 rows...

There are two ways I think this could be done, and I need your help.
First, if the data was in A, then in B, it would check to see if the
corresponding A row has already been used in the whole column.

ex. A B
_data_ _repeat?__
0 yes
0 yes
2 no
0 yes

The second way I was thinking, and might not be possible, would be if I
build in the function straight to A, so that if the data repeats
somewhere already in A, then it would bold it or () it or something.

ex. A
data *(repeat data)*
*(0)*
*(0)*
2
*(0)*

I don't know, this is very confusing I know, but any help would be
greatly appreciated.


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killertofu
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