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 Python3 (judge verdict: Accepted)

def search(l, n):
    left = 0
    right = len(l) - 1
    while right - left > 1:
        m = (left + right) // 2
        if n == l[m]:
            return True
        elif n < l[m]:
            right = m
        else:
            left = m

    # print(left, right)
    if l[left] == n or l[right] == n:
        return True
    else:
        return False


n = int(input())
s = [int(i) for i in input().split()]
q = int(input())
t = [int(i) for i in input().split()]

ans = 0
for ti in t:
    if search(s, ti):
        ans += 1

print(ans)