Page numbering

Hello everyone.

I am creating a document and I want the single digit page numbering to have a zero in front of them e.g. page 01, page 02...... page 09 then contunue as normal when the documents hits double digits ie page 10, page 11 etc.

I have achieved this in the past with separate master pages for the single digit pages and another for the double digit pages. but I was wondering if there is a more efficient way of doing this.

I am using Indesign CS6

Thanks for your help.

Deji