690employeeimportance.py

"""
You are given a data structure of employee information, which includes the employee's unique id, his importance value and his direct subordinates' id.

For example, employee 1 is the leader of employee 2, and employee 2 is the leader of employee 3. They have importance value 15, 10 and 5, respectively. Then employee 1 has a data structure like [1, 15, [2]], and employee 2 has [2, 10, [3]], and employee 3 has [3, 5, []]. Note that although employee 3 is also a subordinate of employee 1, the relationship is not direct.

Now given the employee information of a company, and an employee id, you need to return the total importance value of this employee and all his subordinates.

Example 1:

Input: [[1, 5, [2, 3]], [2, 3, []], [3, 3, []]], 1
Output: 11
Explanation:
Employee 1 has importance value 5, and he has two direct subordinates: employee 2 and employee 3. They both have importance value 3. So the total importance value of employee 1 is 5 + 3 + 3 = 11.
"""


class Employee:
    def __init__(self, id, importance, subordinates):
        # It's the unique id of each node.
        # unique id of this employee
        self.id = id
        # the importance value of this employee
        self.importance = importance
        # the id of direct subordinates
        self.subordinates = subordinates


class Solution:
    def getImportance(self, employees, id):
        """
        :type employees: Employee
        :type id: int
        :rtype: int
        """
        # 树的层次遍历, depth-first
        emp_dict = {}
        for e in employees:
            emp_dict[e.id] = e

        emp = emp_dict[id]
        queue = [emp]
        s = 0
        while len(queue) > 0:
            new_queue = []
            for emp in queue:
                s += emp.importance
                for id in emp.subordinates:
                    new_queue.append(emp_dict[id])
            queue = new_queue
        return s


if __name__ == '__main__':
    s = Solution()
    a = [[1, 5, [2, 3]], [2, 3, []], [3, 3, []]]
    b = 1
    c = s.getImportance(a, b)
    print(c)