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>
#define N 100000

int BS(int n,int *s,int key){
  int m;
  int l=0,r;
  r=n;
  while(r>l+1){
    m=(l+r)/2;
    if(s[m]>key)r=m;
    else l=m;
  }
  return s[l]==key;
}


int main(){
  int c=0,n,i;
  int s[N];
  int q,t;
  
  scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&s[i]);
  }

  scanf("%d",&q);
  for(i=0;i<q;i++){
    scanf("%d",&t);
    c+=BS(n,s,t);
  }
  printf("%d\n",c);
  return 0;
  
}