Example 1

Example 2

1 <= employees.length <= 20001 <= employees[i].id <= 2000All employees[i].id are unique.-100 <= employees[i].importance <= 100One employee has at most one direct leader and may have several subordinates.The IDs in employees[i].subordinates are valid IDs.Example 1

Example 2

1 <= employees.length <= 20001 <= employees[i].id <= 2000All employees[i].id are unique.-100 <= employees[i].importance <= 100One employee has at most one direct leader and may have several subordinates.The IDs in employees[i].subordinates are valid IDs.