基于#派仔#的修改

import java.util.Scanner;

import java.util.*;


// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    private class Node{
        int val;
        Node next;
        Node(int val){
            this.val=val;
        }
    }
    private Node head;
    public Main(int val){
        head=new Node(val);
    }
    public void insert(int val,int node){
        Node p=head;
        while(p.val !=node){
            p=p.next;
        }
        Node newNode=new Node(val);
        newNode.next=p.next;
        p.next=newNode;
    }
    public void delete(int node){
        if(node==head.val){
            head=head.next;
            return;
        }
        Node p=head;
        while(node !=p.next.val){
            p=p.next;
        }
        if(p.next.next==null){
            p.next=null;
            return;
        }
        p.next=p.next.next;
    }
    public Node head(){
        return this.head;
    }
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNext()) { // 注意 while 处理多个 case
            int n=in.nextInt();
            int val=in.nextInt();
            Main solution=new Main(val);
            for(int i=0;i<n-1;i++){
                int value=in.nextInt();
                int index=in.nextInt();
                solution.insert(value,index);
            }
            val=in.nextInt();
            solution.delete(val);
            Node p=solution.head();
            while(p!=null){
                System.out.print(p.val+" ");
                p=p.next;
            }
            System.out.println();
        }
    }
}