Meta phone screen

I recently completed a phone screen interview for a Software Engineer position at Meta. The interview consisted of two coding problems. The first was the Minimum Window Substring problem from Leetcode, which I attempted to solve using a sliding window approach. I optimized my solution as much as possible within the given time constraints. The second problem was the Course Schedule problem from Leetcode. Unfortunately, I ran out of time and was unable to provide a complete solution for this problem. Despite months of preparation and significant professional experience, I was not successful in this round.