Org Depth
An org chart is represented as a dict `chart`, where each key is an employee id and its value is a list of that employee's direct reports' ids. Given the hierarchy's `root`, return the org's maximum depth — the number of levels from the root down to the farthest report (the root itself counts as lev
An org chart is represented as a dict `chart`, where each key is an employee id and its value is a list of that employee's direct reports' ids. Given the hierarchy's `root`, return the org's maximum depth — the number of levels from the root down to the farthest report (the root itself counts as lev
