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 S[100000], n;

int binarySearch(int key){
  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;
}

int main()
{
  int q, T[50000], C, i;
  C = 0;
 
  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]);
    if(binarySearch(T[i])) C++;
  }
 
  printf("%d\n", C);
 
  return 0;
}