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)

#include <stdio.h>
#define N 100000
#define Q 5000
main(){

  int s,t,c=0,i,j,m,r,l;
  int a[N],b[Q];
  scanf("%d",&s);
  for(i = 0; i < s; i++){
    scanf("%d",&a[i]);
  }
    scanf("%d",&t); 
   for(i = 0; i < t; i++){
      scanf("%d",&b[i]);
      r = s;
      l = 0;
      while(l <= r){
	m = (r + l) / 2;
	if(b[i] == a[m])
	  {
	    c++;
	    break;
	  }
	else if(b[i] > a[m]) l = m + 1;
	else if(b[i] < a[m]) r = m - 1;
      }
   }
printf("%d\n",c);
 return 0;
}