Meta screening

I had a phone screen interview with Meta yesterday and am awaiting a response. The questions were:

• Sum Root to Leaf Numbers
• Find First and Last Position of Element in Sorted Array For the first question, I explained the solution, including time complexity, and coded it as quickly as possible to move on to the second question. The interviewer pointed out a bug in my code, which I successfully identified and fixed. For the second problem, the interviewer requested the count of target repetitions instead of the original problem's objective. I explained a brute-force solution and then proposed a more efficient approach using binary search. I began working through examples when the interviewer stopped me and provided a hint on finding the target's boundaries. I quickly explained the solution after the hint and the interviewer agreed with my approach. I had 10 minutes to code the solution while explaining my process. After finishing, I began verifying my code, but the interviewer stopped me, indicating it was not necessary. I am hopeful that the interview went well. Edit: The interview apparently went well, and I am moving to the next stage.