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 binarySearch(int);
int n,s[100000];
int main(){
	int q,t[50000],i,cnt=0;
	
	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++){
		if(binarySearch(t[i])==1) cnt++;
	}
	
	printf("%d\n",cnt);
	
	return 0;
}

int binarySearch(int key){
	int left=0,right=n,mid;
	
	while(left<right){
		mid=(left+right)/2;
		if(s[mid]==key) return 1;
		else if(key<s[mid]) right=mid;
		else left=mid+1;
	}
	return 0;
}