import java.util.*;

/**

 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.
 Note:
 One employee has at most one direct leader and may have several subordinates.
 The maximum number of employees won't exceed 2000.

 */

public class Employee_Importance {

    public static void main(String[] args) {
        Employee_Importance out = new Employee_Importance();
        Solution s = out.new Solution();

        List<Employee> list = new ArrayList<>();
        System.out.println(s.getImportance(list, 1));
    }

    class Solution {
        public int getImportance(List<Employee> employees, int id) {

            // find the employee with this id
            Employee target = null;
            HashMap<Integer, Employee> hm = new HashMap<>();
            for (Employee each: employees) {
                if (each.id == id) {
                    target = each;
                }

                // setup a lookup from id to actual Employee object
                hm.put(each.id, each);
            }

            if (target == null) {
                return -1;
                // throw exception this id invalid
            }

            int total = 0;
            Queue<Employee> q = new LinkedList<>();
            q.offer(target);
            while (!q.isEmpty()) {
                Employee current = q.poll();
                total += current.importance;

                // worried about circle-reporting, reporting to self
                for (int eachId: current.subordinates) {
                    q.offer(hm.get(eachId));
                }
            }

            return total;
        }
    }

    // Employee info
    class Employee {
        // It's the unique id of each node;
        // unique id of this employee
        public int id;
        // the importance value of this employee
        public int importance;
        // the id of direct subordinates
        public List<Integer> subordinates;
    };

}

############

/*
// Definition for Employee.
class Employee {
    public int id;
    public int importance;
    public List<Integer> subordinates;
};
*/

class Solution {

    private final Map<Integer, Employee> map = new HashMap<>();

    public int getImportance(List<Employee> employees, int id) {
        for (Employee employee : employees) {
            map.put(employee.id, employee);
        }
        return dfs(id);
    }

    private int dfs(int id) {
        Employee employee = map.get(id);
        int sum = employee.importance;
        for (Integer subordinate : employee.subordinates) {
            sum += dfs(subordinate);
        }
        return sum;
    }
}

// OJ: https://leetcode.com/problems/employee-importance/
// Time: O(N)
// Space: O(N)
class Solution {
private:
    unordered_map<int, Employee*> m;
    int collect(int id) {
        auto e = m[id];
        int ans = e->importance;
        for (auto &s : e->subordinates) ans += collect(s);
        return ans;
    }
public:
    int getImportance(vector<Employee*> employees, int id) {
        for (auto &e : employees) m[e->id] = e;
        return collect(id);
    }
};

"""
# Definition for Employee.
class Employee:
    def __init__(self, id: int, importance: int, subordinates: List[int]):
        self.id = id
        self.importance = importance
        self.subordinates = subordinates
"""


class Solution:
    def getImportance(self, employees: List['Employee'], id: int) -> int:
        m = {emp.id: emp for emp in employees}

        def dfs(id: int) -> int:
            emp = m[id]
            s = emp.importance
            for sub in emp.subordinates:
                s += dfs(sub)
            return s

        return dfs(id)

############

"""
# Employee info
class Employee(object):
    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(object):
    def getImportance(self, employees, id):
        """
        :type employees: Employee
        :type id: int
        :rtype: int
        """
        employee_dict = {employee.id : employee for employee in employees}
        def dfs(id):
            return employee_dict[id].importance + sum(dfs(id) for id in employee_dict[id].subordinates)
        return dfs(id)

/**
 * Definition for Employee.
 * function Employee(id, importance, subordinates) {
 *     this.id = id;
 *     this.importance = importance;
 *     this.subordinates = subordinates;
 * }
 */

/**
 * @param {Employee[]} employees
 * @param {number} id
 * @return {number}
 */
var GetImportance = function (employees, id) {
    const map = new Map();
    for (const employee of employees) {
        map.set(employee.id, employee);
    }
    const dfs = id => {
        const employee = map.get(id);
        let sum = employee.importance;
        for (const subId of employee.subordinates) {
            sum += dfs(subId);
        }
        return sum;
    };
    return dfs(id);
};

/*
// Employee info
class Employee {
    // It's the unique id of each node;
    // unique id of this employee
    public int id;
    // the importance value of this employee
    public int importance;
    // the id of direct subordinates
    public List<Integer> subordinates;
};
*/
class Solution {
    public int getImportance(List<Employee> employees, int id) {
        Map<Integer, Integer> employeeImportanceMap = new HashMap<Integer, Integer>();
        Map<Integer, List<Integer>> employeeSubordinatesMap = new HashMap<Integer, List<Integer>>();
        for (Employee employee : employees) {
            int employeeId = employee.id;
            int importance = employee.importance;
            List<Integer> subordinates = employee.subordinates;
            employeeImportanceMap.put(employeeId, importance);
            if (subordinates != null)
                employeeSubordinatesMap.put(employeeId, subordinates);
        }
        int totalImportance = 0;
        Queue<Integer> queue = new LinkedList<Integer>();
        queue.offer(id);
        while (!queue.isEmpty()) {
            int curId = queue.poll();
            int importance = employeeImportanceMap.get(curId);
            totalImportance += importance;
            List<Integer> subordinates = employeeSubordinatesMap.getOrDefault(curId, new ArrayList<Integer>());
            for (int subordinate : subordinates)
                queue.offer(subordinate);
        }
        return totalImportance;
    }
}

############

/*
// Definition for Employee.
class Employee {
    public int id;
    public int importance;
    public List<Integer> subordinates;
};
*/

class Solution {

    private final Map<Integer, Employee> map = new HashMap<>();

    public int getImportance(List<Employee> employees, int id) {
        for (Employee employee : employees) {
            map.put(employee.id, employee);
        }
        return dfs(id);
    }

    private int dfs(int id) {
        Employee employee = map.get(id);
        int sum = employee.importance;
        for (Integer subordinate : employee.subordinates) {
            sum += dfs(subordinate);
        }
        return sum;
    }
}

// OJ: https://leetcode.com/problems/employee-importance/
// Time: O(N)
// Space: O(N)
class Solution {
private:
    unordered_map<int, Employee*> m;
    int collect(int id) {
        auto e = m[id];
        int ans = e->importance;
        for (auto &s : e->subordinates) ans += collect(s);
        return ans;
    }
public:
    int getImportance(vector<Employee*> employees, int id) {
        for (auto &e : employees) m[e->id] = e;
        return collect(id);
    }
};

"""
# Definition for Employee.
class Employee:
    def __init__(self, id: int, importance: int, subordinates: List[int]):
        self.id = id
        self.importance = importance
        self.subordinates = subordinates
"""


class Solution:
    def getImportance(self, employees: List['Employee'], id: int) -> int:
        m = {emp.id: emp for emp in employees}

        def dfs(id: int) -> int:
            emp = m[id]
            s = emp.importance
            for sub in emp.subordinates:
                s += dfs(sub)
            return s

        return dfs(id)

############

"""
# Employee info
class Employee(object):
    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(object):
    def getImportance(self, employees, id):
        """
        :type employees: Employee
        :type id: int
        :rtype: int
        """
        employee_dict = {employee.id : employee for employee in employees}
        def dfs(id):
            return employee_dict[id].importance + sum(dfs(id) for id in employee_dict[id].subordinates)
        return dfs(id)

/**
 * Definition for Employee.
 * function Employee(id, importance, subordinates) {
 *     this.id = id;
 *     this.importance = importance;
 *     this.subordinates = subordinates;
 * }
 */

/**
 * @param {Employee[]} employees
 * @param {number} id
 * @return {number}
 */
var GetImportance = function (employees, id) {
    const map = new Map();
    for (const employee of employees) {
        map.set(employee.id, employee);
    }
    const dfs = id => {
        const employee = map.get(id);
        let sum = employee.importance;
        for (const subId of employee.subordinates) {
            sum += dfs(subId);
        }
        return sum;
    };
    return dfs(id);
};

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