Very similar to https://leetcode.com/discuss/interview-question/328768/Amazon-or-Phone-screen-or-Organization-chart

input: "1:Name1:2, 2:Name2:4, ..." // "id:name:manager_id"
output: "Name
-Name1
-Name2
--Name3"

Didn't know how to build tree from given string. Having N-Tree as an input problem is trivial (Level Order Traversing).
Dont remember details. Office Seattle. August 2019.