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 n,q;
  int s[N],t[Q];
  int cnt=0,i,left,right,mid;

  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++){
    left=0;
    right=n;
    while(left<right){
      mid=(left+right)/2;
      if(s[mid]==t[i]){
	cnt++;
	break;
      }
      else if(t[i]<s[mid])right=mid;
      else left=mid+1;
    }
  }
  printf("%d\n",cnt);
  return 0;
}