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;

class A4{
  public static void Main(){
    int n,q;
    n = int.Parse(Console.ReadLine());

    string[] str = Console.ReadLine().Split(' ');

    q = int.Parse(Console.ReadLine());

    string[] str2 = Console.ReadLine().Split(' ');

    //string[] memory = new string[n];
    n = 0;
    for(int i = 0;i < q;i++){
      if(Array.IndexOf(str,str2[i]) != -1){
      str[n] =  str[Array.IndexOf(str,str2[i])];
      n++;
    }

    }
    Console.WriteLine(n);
  }
}