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 main()
{
    int n,q,cnt =0;
    scanf("%d",&n);
    int *S = malloc(sizeof(int)*n);
    for(int i=0;i<n;i++) scanf("%d",&S[i]);
    scanf("%d",&q);
    int *T = malloc(sizeof(int)*q);
    for(int i=0;i<q;i++) scanf("%d",&T[i]);
    int r,l,s;
    for(int i=0;i<q;i++)
    {
        r = n;
        l = 0;
        while(l<r)
        {
            s = (r+l)/2;
            if(T[i]==S[s])
            {
                cnt++;
                break;
            }
            else
            {
                if(S[s]<T[i])
                {
                    l = s+1;
                }
                else
                {
                    r = s;
                }
            }
        }
    }
    printf("%d\n",cnt);
    free(T);
    free(S);
}