I'm sorry for the title typo it should be 52/39 and 12-23. and Tl;Dr: will I run into any functionality problems (shifting issues, etc) by using a 52/39 crank with a 12-23 cassette?

I am building a bike with 9 speed campagnolo parts. The parts are off someone else's bike, and the sprocket sizes on the crank are not standard for what the crank set was designed for. It is a 52/39 crank but the big ring indicates it is supposed to be paired as 52/42. It has a 12-23 cassette. What I want to know is: is this crank set and cassette functionally pairable? Will I run into anything like shifting problems by using this pairing?
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Thank you in advance for the help. I think this is probably a dumb question but I can't find the answer and I really have spent a long time looking. I also tried Sheldon's calculator but I don't understand what it's telling me. And every piece of research I find is asking if a given gear ratio is good for *riding* but I just want to make sure my combination is functionally compatible. I am a casual rider and definitely not a racer so I feel confident I can make whatever gearing I have work for me.