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>

#define N 100000

int main(){
  int n, q;
  int count = 0;
  int left, mid, right;
  int S[N],T[N];
  int i, key;
  

  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++){
    key = T[i];
    left = 0;
    right = n;
    
    while(left < right){
      mid = (left + right) / 2;
      
      if(key == S[mid]){
	count++;
	break;
      }

      if(key > S[mid]) left = mid + 1;
      else if(key < S[mid]) right = mid;
    }
  }

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