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;
using System.Linq;
using System.IO;
using System.Text;
using System.Collections;
using System.Collections.Generic;
 
class Program{
    static void Main(){
        int n = int.Parse(Console.ReadLine());
        int[] S = Console.ReadLine().Split(' ')
                                         .Select(val => int.Parse(val))
                                         .ToArray();
        int q = int.Parse(Console.ReadLine());
        int[] T = Console.ReadLine().Split(' ')
                                         .Select(val => int.Parse(val))
                                         .ToArray();
        int cnt = 0;
        int i = 0;
        Array.Sort(T);
        for(int j = 0; j < q; j++)
        {
            while(i < n - 1 && S[i] < T[j]) i++;
            if(i < n && S[i] == T[j]) {
                cnt++;
                i++;
            }
        }
        Console.WriteLine(cnt);
    }
}