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 H[1000000],h;
int binarySearch(int);

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

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

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

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

  }
  
  return 0;
  
}