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 S[n],T[q];
  int l,r,x,y,count=0,i,m;

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

  scanf("%d",&y);
  for(i=0;i<y;i++)
    scanf("%d",&T[i]);

  for(i=0;i<y;i++){
    l=0;
    r=x;
    while(l<r){
      m=(l+r)/2;
      if(S[m]==T[i]){
	count++;
	break;
      }
      else if(T[i]<S[m])r = m;
      else l = m+1;
    }
  }
  
  printf("%d\n",count);

  return 0;
}