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 n;
int binarySearch(int A[],int);

int main(){

  int S[1000003],q,i,s=0;
  scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&S[i]);
  }
  scanf("%d",&q);
  int T[q];
  for(i=0;i<q;i++){
    scanf("%d",&T[i]);
  }

  for(i=0;i<q;i++)
    {
      if(binarySearch(S,T[i])==1)
	s++;
    }

  printf("%d\n",s);

  return 0;
}

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