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)

n = int(input())
S = [int(i) for i in input().split()]
q = int(input())
T = [int(i) for i in input().split()]
c = 0
for t in T:#L<t,U>=t
    L = -1
    U = n
    while U - L > 1:
        x = (L+U)//2
        if S[x] >= t:
            U = x
        else:
            L = x
    if S[U]==t:
        c+=1
print(c)