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 main(){

  int n,q,i,j,count=0;
  int S[1000000];
  int T[1000000];
  int mid,left,right,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(j=0; j<q; j++){
    key = T[j];
    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;
}