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 binary(int);

int s[100001], n;

int main(){
  int i, c = 0, q, t[50001];

  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[i]);

  for(i=0; i<q; i++) c += binary(t[i]);

  printf("%d\n", c);
  
  return 0;
}

int binary(int key){
  int left = 0, right = n, mid;

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