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>

int main(void){
  int a[100000], b[5000], count=0;
  int i, right, left, center, n, q;
  scanf("%d",&n);
  for(i=0; i<n; i++){
    scanf("%d",&a[i]);
  }
  scanf("%d", &q);
  for(i=0; i<q; i++){
    scanf("%d", &b[i]);
  }
  for(i=0; i<q; i++){
    right = n;
    left = 0; 
    while(left<=right){
      center = (right + left)/2;
      if(a[center] == b[i]) {
	count++;
	break;
      }
      else if(a[center] < b[i])
	left = center + 1;
      else
	right = center - 1;
    }
  }
  printf("%d\n", count);
  return 0;
}