Meta | E4 | Phone Screen | FAILED

Round 1

Questions:

1. 938. Range Sum of BST
   I knew the solution but choked, messed up the return value, and used a global variable to fix it (which the interviewer didn’t like). I also messed up time and space complexity.

2. Variant of merge intervals, input is two sorted interval lists. Same as posted here in discuss.
   I was writing the full-code, interviewer said he got the idea toward the end and didn't let me finish.