It was a fundamental yet insightful technical discussion centered around data structures and algorithms. During this discussion, I demonstrated my problem-solving abilities by coding efficient solutions on HackerRank, using Java as my preferred language.

1. Remove the maximum and minimum elements and add them back to the array. Find the total cost involved, where cost = (max + min) / (max - min + 1).

2. Take the consecutive ASCII difference of consecutive strings as a reference. For example, 'abcd' has differences 1, 1, 1, and 'prs' has differences 2, 1. So, if there are multiple strings of the same length, we need to find the odd one out with different consecutive ASCII differences.