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 Python (judge verdict: Accepted)

if __name__ == '__main__':
    n = int(raw_input())
    S = map(int, raw_input().split())
    q = int(raw_input())
    T = map(int, raw_input().split())
    cnt = 0
    for x in T:
        left = 0
        right = n
        # search [left, right)
        while left < right:
            mid = (left + right) / 2
            if S[mid] == x:
                cnt += 1
                break
            elif S[mid] > x:
                right = mid
            else:
                left = mid + 1
    print cnt