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 main() {
  int n, q, i, count = 0; 
  int s[100000], t;
  
  scanf("%d",&n);
  for(i = 0;i < n;i++) scanf("%d",&s[i]);
  
  scanf("%d",&q);
  for(i = 0;i < q;i++) {
    scanf("%d",&t);
    count += binarySearch(n,t,s);
  }
  
  printf("%d\n",count);
  
  return 0;
}

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