Problem:
Set Intersection

Find the intersection of two sets $A = \{a_0, a_1, ..., a_{n-1}\}$ and $B = \{b_0, b_1, ..., b_{m-1}\}$.

Input

The input is given in the following format.

$n$
$a_0 \; a_1 \; ... \; a_{n-1}$
$m$
$b_0 \; b_1 \; ... \; b_{m-1}$

Elements of $A$ and $B$ are given in ascending order respectively. There are no duplicate elements in each set.

Output

Print elements in the intersection in ascending order. Print an element in a line.

Constraints

$1 \leq n, m \leq 200,000$

$0 \leq a_0 < a_1 < ... < a_{n-1} \leq 10^9$

$0 \leq b_0 < b_1 < ... < b_{m-1} \leq 10^9$

Sample Input 1

4
1 2 5 8
5
2 3 5 9 11

Sample Output 1

2
5

Solution in JAVA (judge verdict: Accepted)

import java.util.*;
import java.io.*;
public class Main {

	public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		TreeSet<Integer> set=new TreeSet<>();
		int n=in.nextInt();
		for(int i=0;i<n;i++) {
			set.add(in.nextInt());
		}
		
		int m=in.nextInt();
		PrintWriter out=new PrintWriter(System.out);
		for(int i=0;i<m;i++) {
			int obj=in.nextInt();
			if(set.contains(obj))out.println(obj);
		}
		out.flush();
	}

}