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.Collections.Generic;

namespace binarySearch
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.ReadLine();
            var S = new HashSet<int>();
            foreach (var s in Console.ReadLine().Split(' '))
            {
                S.Add(int.Parse(s));
            }
            Console.ReadLine();
            var T = new HashSet<int>();
            foreach (var t in Console.ReadLine().Split(' '))
            {
                T.Add(int.Parse(t));
            }

            S.IntersectWith(T);
            Console.WriteLine(new int[S.Count].Length);
        }
    }
}