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: Time Limit Exceeded)

#include<stdio.h>
  
int main(){
  int i, j, n, q, c=0;
  int S[100001], T[50001];
  
  scanf("%d",&n);
  for(i=1; i<=n; i++){
    scanf("%d",&S[i]);
  }
  scanf("%d",&q);
  for(i=1; i<=q; i++){
    scanf("%d",&T[i]);
  }
  for(j=1; j<=n; j++){
    for(i=1; i<=q; i++){
      if(S[j] == S[j+1]) continue;
      if(T[i] == S[j]) c++;
    }
  }
  for(j=n; j>n/2; j--){
    for(i=q; i<=q; i--){
      if(S[j] == S[j-1]) continue;
      if(T[i] == S[j]) c++;
    }
  }
  printf("%d\n",c);
  return 0;
}