02. Sets of Elements

package DPM;

import java.util.LinkedHashSet;
import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int fNum = scan.nextInt();
        int sNum = scan.nextInt();
        LinkedHashSet<Integer> fSet = new LinkedHashSet<>();
        LinkedHashSet<Integer> sSet = new LinkedHashSet<>();
        for (int i = 0; i < fNum; i++) {
            int num = scan.nextInt();
            fSet.add(num);
        }
        for (int i = 0; i < sNum; i++) {
            int num = scan.nextInt();
            sSet.add(num);
        }
        fSet.retainAll(sSet);

        for (Integer integer : fSet) {
            System.out.print(integer+ " ");
        }
    }
}