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.Linq;
using System.Collections.Generic;

public class BinarySearch{
	public static void Main()
	{
		Console.ReadLine();
		var sList = ReadLineAndToIntList();
		Console.ReadLine();
		var tList = ReadLineAndToIntList();
	
		int count = 0;
		tList.ForEach(t =>{
			if(MyBinarySearch(sList, t) >= 0) count++;
		});
		
		Console.WriteLine(count);
	}
	
	//??????????????????????????????
	public static List<int> ReadLineAndToIntList()
	{
		return Console.ReadLine().Split().Select (c => int.Parse(c)).ToList();
	}
	
	public static int MyBinarySearch(List<int> list, int target)
	{
		int left = 0;
		int right = list.Count() -1;
		while( left < right )
		{
			int mid = (left + right) / 2;
			if(list[mid] == target) return mid;
			else if( target < list[mid] ) right = mid;
			else left = mid + 1;
		}
		return -1;
	}
}