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 binarySearch(int,int [],int);

int A[1000001],n;

int main(){
  int i,q,key;
  int count = 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",&key);
    if(binarySearch(n,A,key) != 0)
      count++;
  }
  printf("%d\n",count);

  return 0;
}

int binarySearch(int n,int A[],int key){
  int right = n;
  int left = 0;
  int mid;

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