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)

const input = require('fs').readFileSync('/dev/stdin', 'utf8');
const Arr = (input.trim()).split("\n");
const N1 = Number(Arr[0]);
const arr1 = Arr[1].split(" ").map(Number);
const arr2 = Arr[3].split(" ").map(Number);
console.log(arr2.map(key => {   
  let mid;
  let left = 0;
  let right = N1;
  if (key < arr1[0] || arr1[N1-1] < key) return 0;
  while (left < right) {
    mid = Math.floor((left + right) / 2);
    if (key < arr1[mid]) right = mid;
    else if (key > arr1[mid]) left = mid + 1;
    else return 1;
  }
  return 0;
}).reduce((a, b) => a + b));