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 S[10000];

int binaryserch(int q,int head ,int tail) {

    if (q == S[(head + tail) / 2])
        return 1;
    else if (q < S[(head + tail) / 2])
        binaryserch(q, head, (head + tail) / 2 - 1);
    else if(q > S[(head+tail)/2])
        binaryserch(q, (head + tail) / 2 +1,tail );

}


int main(void) {
    int i, j,q,n;
    int T[500];
    int count = 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++) {
        count += binaryserch(T[i],0,n-1);
    }

    printf("%d", count);

    return 0;
}