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 A[10000000], n;

int binarySearch(int key){
 int left = 0;
 int right = n;
 int mid;
 while(left < right){
  mid = (left + right) / 2;
  if(key == A[mid]) return 1;
  if(key > A[mid]) left = mid + 1;
  else if(key < A[mid]) right = mid;
 }
 return 0;
}

int main(){
 int i, q, k, sum = 0;

 scanf("%d", &n);
 for(i = 0; i < n; i++){
  scanf("%d", &A[i]);
 }

 scanf("%d", &q);
 for(i = 0; i < q; i++){
  scanf("%d", &k);
  if(binarySearch( k )) sum++;
 }
 printf("%d\n", sum);

 return 0;
}