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 JavaScript (judge verdict: Accepted)

var binarySearch = function(key, n, a) {
  var left = 0;
  var right = n;
  while (left < right) {
    var mid = Math.floor((left + right) / 2);
    if (a[mid] == key) {
      return true;
    } else if (key < a[mid]) {
      right = mid;
    } else {
      left = mid + 1;
    }
  }

  return false;
};

(function(stdin) {
  var arr = (stdin.trim()).split('\n');
  var s = arr[1].split(" ").map(Number);
  var t = arr[3].split(" ").map(Number);
 
  var ans = 0;
  for (var i = 0; i < t.length; i++) {
    ans += binarySearch(t[i], s.length, s);
  }
  console.log(ans);
})(require('fs').readFileSync('/dev/stdin', 'utf8'));