Problem:
Search II

You are given a sequence of n integers S and a sequence of different q integers T. Write a program which outputs C, the number of integers in T which are also in the set S.

Input

In the first line n is given. In the second line, n integers are given. In the third line q is given. Then, in the fourth line, q integers are given.

Output

Print C in a line.

Constraints

Elements in S is sorted in ascending order

n ≤ 100000

q ≤ 50000

0 ≤ an element in S ≤ 109

0 ≤ an element in T ≤ 109

Sample Input 1

5
1 2 3 4 5
3
3 4 1

Sample Output 1

3

Sample Input 2

3
1 2 3
1
5

Sample Output 2

0

Sample Input 3

5
1 1 2 2 3
2
1 2

Sample Output 3

2

Notes

Solution in JAVA (judge verdict: Accepted)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigInteger;
import java.sql.Array;
import java.util.*;

public class Main {

    static long gcd (long a, long b) {return b>0?gcd(b,a%b):a;}
    static long lcm (long a, long b) {return a*b/gcd(a,b);}

    public static void main(String[] args){
	// write your code here
        Scanner sc=new Scanner(System.in);
        Set<Long> set = new HashSet<Long>();
        int n=sc.nextInt();
        for(int i=0;i<n;i++){
            long S=sc.nextLong();
            set.add(S);
        }
        long ans=0;
        int q=sc.nextInt();
        for(int i=0;i<q;i++){
            long T = sc.nextLong();
            if (set.contains(T)) {
                ans++;
            }
        }
        System.out.println(ans);

    }
}