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>

int main(){
  int n,q,i,j,k;
  int left,right,mid,cnt;
  int s[100000],t[50000];

  cnt = 0;
  
   scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&s[i]);
  }
  
  scanf("%d",&q);
  for(j=0;j < q;j++){
    scanf("%d",&t[j]);
  }
    
  for(k=0;k < q;k++){
    left = 0; right = n;
    while( left < right){
      mid = (left + right) / 2;
      if (s[mid] == t[k]){
	cnt++;
	break;
      } else if (s[mid] > t[k]){
	right = mid;
      } else {
	left = mid + 1;
      }
    }
  }
  printf("%d\n",cnt);
  return 0;
}