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 i,n,q,c=0,left,right,mid;

  scanf("%d",&n);

  int S[n];
  for(i=0;i<n;i++) scanf("%d",&S[i]);

  scanf("%d",&q);

  int T[q];
  for(i=0;i<q;i++){
    scanf("%d",&T[i]);

    left=0;
    right=n;

    while(left<right){
      mid=(left+right)/2;

      if(T[i]>S[mid]) left=mid+1;
      else if(T[i]<S[mid]) right=mid;
      
      else{
	c++;
	break;
      }
    }
  }

  printf("%d\n",c);

  return 0;
}