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(int n,int A[],int key)
{

  int left, right, mid;

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

int main()
{

  int count, n, q, i;

  count = 0;

  scanf("%d",&n);
  int S[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(a(n,S,T[i]) != -1){
      count++;
    }
  }

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

  return 0;

}