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.Collections.Generic;
using System.Linq;
using System.Text;
using System;
using System.IO;

public class Playground
{
    private static int[] item1;
    private static int[] item2;

    public static void Main(string[] args)
    {
        Input();
        Method();
        System.Console.ReadLine();
    }

    private static void Input()
    {
        Console.ReadLine();
        item1 = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
        Console.ReadLine();
        item2 = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
    }

    private static void Method()
    {
        int sum = 0;
        foreach (var t in item2)
        {
            int lo = 0;
            int hi = item1.Length;
            while (lo <= hi && lo < item1.Length)
            {
                int medium = lo + (hi - lo) / 2;
                if (t == item1[medium])
                {
                    sum++;
                    break;
                }
                else if (t > item1[medium])
                {
                    lo = medium + 1;
                }
                else
                {
                    hi = medium - 1;
                }
            }
        }

        System.Console.WriteLine(sum);
    }
}