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- import java.io.BufferedReader;
- import java.io.IOException;
- import java.io.InputStreamReader;
- class MapEntry<K extends Comparable<K>,E> implements Comparable<K> {
- // Each MapEntry object is a pair consisting of a key (a Comparable
- // object) and a value (an arbitrary object).
- K key;
- E value;
- public MapEntry (K key, E val) {
- this.key = key;
- this.value = val;
- }
- public int compareTo (K that) {
- // Compare this map entry to that map entry.
- @SuppressWarnings("unchecked")
- MapEntry<K,E> other = (MapEntry<K,E>) that;
- return this.key.compareTo(other.key);
- }
- public String toString () {
- return "<" + key + "," + value + ">";
- }
- }
- class SLLNode<E> {
- protected E element;
- protected SLLNode<E> succ;
- public SLLNode(E elem, SLLNode<E> succ) {
- this.element = elem;
- this.succ = succ;
- }
- @Override
- public String toString() {
- return element.toString();
- }
- }
- class CBHT<K extends Comparable<K>, E> {
- // An object of class CBHT is a closed-bucket hash table, containing
- // entries of class MapEntry.
- private SLLNode<MapEntry<K,E>>[] buckets;
- @SuppressWarnings("unchecked")
- public CBHT(int m) {
- // Construct an empty CBHT with m buckets.
- buckets = (SLLNode<MapEntry<K,E>>[]) new SLLNode[m];
- }
- private int hash(K key) {
- // Translate key to an index of the array buckets.
- return Math.abs(key.hashCode()) % buckets.length;
- }
- public SLLNode<MapEntry<K,E>> search(K targetKey) {
- // Find which if any node of this CBHT contains an entry whose key is
- // equal
- // to targetKey. Return a link to that node (or null if there is none).
- int b = hash(targetKey);
- for (SLLNode<MapEntry<K,E>> curr = buckets[b]; curr != null; curr = curr.succ) {
- if (targetKey.equals(((MapEntry<K, E>) curr.element).key))
- return curr;
- }
- return null;
- }
- public void insert(K key, E val) { // Insert the entry <key, val> into this CBHT.
- MapEntry<K, E> newEntry = new MapEntry<K, E>(key, val);
- int b = hash(key);
- for (SLLNode<MapEntry<K,E>> curr = buckets[b]; curr != null; curr = curr.succ) {
- if (key.equals(((MapEntry<K, E>) curr.element).key)) {
- // Make newEntry replace the existing entry ...
- curr.element = newEntry;
- return;
- }
- }
- // Insert newEntry at the front of the 1WLL in bucket b ...
- buckets[b] = new SLLNode<MapEntry<K,E>>(newEntry, buckets[b]);
- }
- public void delete(K key) {
- // Delete the entry (if any) whose key is equal to key from this CBHT.
- int b = hash(key);
- for (SLLNode<MapEntry<K,E>> pred = null, curr = buckets[b]; curr != null; pred = curr, curr = curr.succ) {
- if (key.equals(((MapEntry<K,E>) curr.element).key)) {
- if (pred == null)
- buckets[b] = curr.succ;
- else
- pred.succ = curr.succ;
- return;
- }
- }
- }
- public String toString() {
- String temp = "";
- for (int i = 0; i < buckets.length; i++) {
- temp += i + ":";
- for (SLLNode<MapEntry<K,E>> curr = buckets[i]; curr != null; curr = curr.succ) {
- temp += curr.element.toString() + " ";
- }
- temp += "\n";
- }
- return temp;
- }
- }
- public class RoutingHashJava {
- public static void main (String[] args) throws IOException {
- CBHT<String,String[]> tabela;
- BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
- int N = Integer.parseInt(br.readLine());
- tabela=new CBHT<String,String[]>(2*N);
- for(int i=1;i<=N;i++){
- String interfejs=br.readLine();
- String routing_table=br.readLine();
- String ruti[] = routing_table.split(",");
- String hostNetworks[] = new String[ruti.length];
- for(int j=0; j<ruti.length; j++) {
- hostNetworks[j] = ruti[j].substring(0, ruti[j].lastIndexOf('.'));
- }
- tabela.insert(interfejs, hostNetworks);
- }
- int M = Integer.parseInt(br.readLine());
- for (int i=1;i<=M;i++)
- {
- String ip_adresa_interfejs=br.readLine();
- String mreza = br.readLine();
- mreza=mreza.substring(0, mreza.lastIndexOf('.'));
- if(tabela.search(ip_adresa_interfejs) != null) {
- String[] hostNetworks = tabela.search(ip_adresa_interfejs).element.value;
- for(int j=0; j<hostNetworks.length; j++) {
- if (hostNetworks[j].equals(mreza)) {
- System.out.println("postoi");
- break;
- }
- if(j == hostNetworks.length-1) System.out.println("ne postoi");
- }
- }
- else System.out.println("ne postoi");
- }
- }
- }
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