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>

int main()
{
  int n,q,s[100000],t[50000],cnt=0,i,j,key;
  int l,m,r;
  
  scanf("%d",&n);
  for(i=0;i<n;i++) scanf("%d",&s[i]);
  scanf("%d",&q);
  for(j=0;j<q;j++) scanf("%d",&t[j]);

  for(i=0;i<q;i++){
    l=0;
    r=n;
    while(l<r){
      key=t[i];
      m=(l+r)/2;
      if(s[m]==key){
	cnt++;
	break;
      }
      else if(key<s[m]) r=m;
      else l=m+1; 
    }
  }
  printf("%d\n",cnt);

  return 0;
}