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: Time Limit Exceeded)

using System;

class ALDS1
{

    static void Main()
    {
        int a = int.Parse(Console.ReadLine());
        string str1 = Console.ReadLine();
        int[] x = new int[a];
        for (int i = 0; i < a; i++)
        {
            x[i] = int.Parse(str1.Split(' ')[i]);
        }
        int b = int.Parse(Console.ReadLine());
        string str2 = Console.ReadLine();
        int cnt = 0, min, max, mid,c;
        for (int i = 0; i < b; i++)
        {
            min = 0; max = a;
            c = int.Parse(str2.Split(' ')[i]);
            while (min<max)
            {
                mid = (min + max) / 2;
                if (c == x[mid])
                {
                    cnt++;
                    break;
                }
                else if (c < x[mid])
                {
                    max = mid;
                }
                else if (c > x[mid])
                {
                    min = mid + 1;
                }
            }
        }
        Console.WriteLine(cnt);
    }

}