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>
#include<stdlib.h>
#define M 1000000
int lub(int l,int r,int n,int *d){
  int m=(l+r)/2;
  if(l==r)return m;
  return n<=d[m]?lub(l,m,n,d):lub(m+1,r,n,d);
}
int main(){
  int n,m,d[100010],c=0,i;
  scanf("%d",&n);
  for(i=0;i<n;i++)scanf("%d",&d[i]);
  scanf("%d",&m);
  while(m--){
    scanf("%d",&i);
    if(d[lub(0,n-1,i,d)]==i)c++;
  }
  printf("%d\n",c);
  return 0;
}