I was contacted by a recruiter about a resume I uploaded almost a year ago. She called later, and we talked. She offered a phone interview, which went smoothly. First, they asked about a couple of projects on my resume and posed technical questions about them. Then, they gave me a programming question, followed by another, which was a variation of the first one. I think the interview went well, but they didn't move forward.

Given a matrix of unsorted integers, find the path with the maximum sum.