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.io.*;
import java.util.*;

class Main{
	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		String[] str = br.readLine().split(" ");
		Set<Integer> S = new TreeSet<Integer>();
		for(int i = 0; i < n; i++){
			S.add(Integer.parseInt(str[i]));
		}
		int m = Integer.parseInt(br.readLine());
		str = br.readLine().split(" ");
		Set<Integer> S2 = new TreeSet<Integer>();
		for(int i = 0; i < m; i++){
			if(S.contains(Integer.parseInt(str[i]))) S2.add(Integer.parseInt(str[i]));
		}
		for(Integer num : S2) System.out.println(num);
	}
}