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 C# (judge verdict: Accepted)

using System;

class Program{
    public static void Main(){
        var n=int.Parse(Console.ReadLine());
        var s=Console.ReadLine().Split(' ');
        var S=new int[n];
        for(var i=0; i<n; i++){
            S[i]=int.Parse(s[i]);
        }
        Console.ReadLine();
        s=Console.ReadLine().Split(' ');

        var cnt=0;
        foreach(var c in s){
            var t=int.Parse(c);
            if(Array.BinarySearch(S, t)>=0){
                cnt++;
            }
        }

        Console.WriteLine(cnt);
    }
}