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)

#include <stdio.h>
#include <stdlib.h>

int A[100000],n;

int binarySearch(int key){
  int left = 0,right = n,mid;
  while (left < right){
    mid = (left + right) / 2;
    if (A[mid] == key)return 1;
    else if (key < A[mid]) right = mid;
    else left = mid + 1;
  }
  return 0;
}


int main(){
  int i,j,m,num=0,key;
  scanf("%d",&n);
  for(i=0;i<n;i++)scanf("%d",&A[i]);
  scanf("%d",&m);
  for(j=0;j<m;j++){
    scanf("%d",&key);
    if(binarySearch(key))num++;
  }
  printf("%d\n",num);

  return 0;
}