After three interviews with a very positive vibe, the recruiter disappeared for more than a week. I sent a message to check the status, and she excused the disappearance with local holidays. She promised to call me back in two days (after the upcoming weekend) to set up a final HR interview. She fulfilled her promise and called two days later, stating that the position had already been filled by an internal move. Really? During the weekend?

Implement the sum of diagonals for an NxN matrix.

Convert an integer to a string using both a regular and a recursive solution.