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
#define q 50000

int main(){

  int a,b,i,left,right,mid;

  int count = 0;
  
  int S[n],T[q];
  
  scanf("%d",&a);

  for(i=0;i<a;i++){
    scanf("%d",&S[i]);
  }

  scanf("%d",&b);

  for(i=0;i<b;i++){
    scanf("%d",&T[i]);
    
    left = 0;
    right = a;

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

      if(S[mid] < T[i]){
	left = mid + 1;
      }

      else if(S[mid] > T[i]){
	right = mid;
      }

    }
  }

  printf("%d\n",count);

  return 0;
}