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文章目录
- 派对的最大快乐值
- 💎总结
派对的最大快乐值
题目
员工信息的定义如下:
公司的每个员工都符合 Employee 类的描述。整个公司的人员结构可以看作是一棵标准的、没有环的多叉树。树的头节点是公司唯一的老板。除老板之外的每个员工都有唯一的直接上级。叶节点是没有任何下属的基层员工(subordinates列表为空),除基层员工外,每个员工都有一个或多个直接下级。
class Employee{
public int happy; //这名员工可以带来的快乐值
List<Employee> subordinates; //这名员工有哪些直接下级
}
派对的最大快乐值
这个公司现在要办party,你可以决定哪些员工来,哪些员工不来,规则:
1.如果某个员工来了,那么这个员工的所有直接下级都不能来
2.派对的整体快乐值是所有到场员工快乐值的累加
3.你的目标是让派对的整体快乐值尽量大给定一棵多叉树的头节点boss,请返回派对的最大快乐值
员工举例
代码实现
public class MaxHappy {
public static class Employee{
public int happy;
List<Employee> next;
public Employee(int happy){
this.happy = happy;
next = new ArrayList<>();
}
}
public static class Info {
public int yes;
public int no;
public Info(int yes, int no) {
this.yes = yes;
this.no = no;
}
}
public static int getMaxHappy(Employee boss) {
if (boss == null) {
return 0;
}
Info allHappy = process(boss);
return Math.max(allHappy.yes, allHappy.no);
}
private static Info process(Employee node) {
// 基层员工的信息
if (node.next.isEmpty()) {
return new Info(node.happy, 0);
}
int yes = node.happy;
int no = 0;
for (Employee next : node.next) {
// 递归
Info nextInfo = process(next);
// 父节点去的话,子节点都不去 的最大快乐值
yes += nextInfo.no;
// 父节点不去,子节点在去或不去的快乐值中选最大的
no += Math.max(nextInfo.yes, nextInfo.no);
}
return new Info(yes, no);
}
// 测试
public static void main(String[] args) {
Employee boss = new Employee(10);
Employee employee0 = new Employee(10);
Employee employee1 = new Employee(5);
Employee employee2 = new Employee(6);
Employee employee3 = new Employee(7);
Employee employee4 = new Employee(3);
Employee employee5 = new Employee(2);
Employee employee6 = new Employee(4);
Employee employee7 = new Employee(1);
Employee employee8 = new Employee(2);
Employee employee9 = new Employee(3);
boss.next.add(employee0);
employee0.next.add(employee1);
employee0.next.add(employee2);
employee0.next.add(employee3);
employee1.next.add(employee4);
employee2.next.add(employee5);
employee3.next.add(employee6);
employee4.next.add(employee7);
employee5.next.add(employee8);
employee6.next.add(employee9);
System.out.println(getMaxHappy(boss));
}
}
💎总结
本文中若是有出现的错误请在评论区或者私信指出,我再进行改正优化,如果文章对你有所帮助,请给博主一个宝贵的三连,感谢大家😘!!!