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: Time Limit Exceeded)

#include<stdio.h>

int main(){
    int n,q;
    long long int S[100000],T[50000];
    scanf("%d",&n);
    int i;
    for(i=0;i<=n-1;i++)scanf("%lld",&S[i]);
    scanf("%d",&q);
    for(i=0;i<=q-1;i++)scanf("%lld",&T[i]);
    int ans=0;
    for(i=0;i<=q-1;i++){
        int sta=0,mid=n/2,end=n;
        long long int t=T[i];
        while(sta!=end){
            if(t<S[mid]){
                end=mid;
                mid=(sta+end)/2;
            }else if(t>S[mid]){
                sta=mid;
                mid=(sta+end)/2;
            }else{
                ans++;
                break;
            }
        }
    }
    printf("%d\n",ans);
    
    return 0;
}