Add Solution2.java to problems 0690

Author: huaxu1024

solution/0690. Employee Importance/Solution2.java

@@ -0,0 +1,33 @@
+/*
+// 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;
+};
+*/
+
+import java.util.*;
+
+class Solution {
+    public int getImportance(List<Employee> employees, int id) {
+        int ans = 0;
+        for (Employee item : employees) {
+            if (item.id == id) {
+                if (item.subordinates.size() == 0) {
+                    return item.importance;
+                }
+                ans += item.importance;
+                for (Employee e : item.subordinates) {
+                    ans += getImportance(employees, e.id);
+                }
+                return ans;
+            }
+        }
+        return ans;
+    }
+}