java两层hashmap，20分后面四个wa

import java.io.BufferedInputStream;

import java.io.IOException;

import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;
import java.util.Scanner;

public class Main {

    static PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
    static Scanner scanner = new Scanner(new BufferedInputStream(System.in));
    static int n,m,op;
//  static HashMap<Integer, Integer> map1=new HashMap<>();
    static HashMap<Integer,Node> map = new HashMap<>();
    public static void main(String[] args) throws IOException {
        n=scanner.nextInt();
        m=scanner.nextInt();
        while(m--!=0) {
            op=scanner.nextInt();
            if(op==1) {
                int a=scanner.nextInt(),
                        b=scanner.nextInt(),
                        c=scanner.nextInt();
                map.put(a, new Node(b, c));
            }else if(op==2) {
                int d=scanner.nextInt(),
                        e=scanner.nextInt();
                out.println(map.get(d).getMap().get(e));
            }
        }
        out.flush();

    }
    static class Node{
        HashMap<Integer, Integer> map = new HashMap<>();
        public Node(int a,int b) {
            // TODO Auto-generated constructor stub
            map.put(a, b);
        }
        public HashMap<Integer, Integer> getMap() {
            return map;
        }

    }

}