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: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;
class Program
{
    static void Main(string[] args)
    {
        int s1 = int.Parse(Console.ReadLine());
        int []f = Console.ReadLine().Split().Select(int.Parse).ToArray();
        List<int> a = new List<int> { };
        for (int i = 0; i < s1; i++)
        {
            a.Add(f[i]);
        }
        int s2 = int.Parse(Console.ReadLine());
        int[] s = Console.ReadLine().Split().Select(int.Parse).ToArray();
        int ans = 0;
        for(int i = 0; i < s2; i++)
        {
            if (a.IndexOf(s[i]) == 1)
            {
                ans++;
            }
        }Console.WriteLine(ans);

    }
}