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>

int s[200000];

int compare(const void* a, const void* b)
{
    return *(int*)a - *(int*)b;
}

int main(void)
{
    int n;
    int q;
    int cnt;
    int i, j;

    scanf("%d", &n);
    for (i = 0; i < n; ++i){
        scanf("%d", s + i);
    }

    scanf("%d", &q);
    cnt = 0;
    for (i = 0; i < q; ++i){
        int t;

        scanf("%d", &t);
        if (bsearch(&t, s, n, sizeof(int), compare) != NULL){
            ++cnt;
        }
    }

    printf("%d\n", cnt);

    return (0);
}