I spent part of my academic career working on 3SUM. When I was recently asked to solve a subset sum problem in an interview, I completely froze. It was horrible

I spent part of my academic career working on 3SUM. When I was recently asked to solve a subset sum problem in an interview, I completely froze. It was horrible. I couldn’t, for whatever reason, remember how-to loop. Needless to say, I didn’t get the job (and I appreciate the trade-off between true positives and false positives). You don’t need to hire them, but I’d ask you to take the most charitable interpretation of their work.