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 Scala (judge verdict: Accepted)

import scala.io.StdIn.readLine
 
object Main {
  def search(a:Array[Int],len:Int,value:Int) = {
    def scan(l:Int,r:Int):Boolean = {
      val mid = (l+r)/2
      if(a(mid) == value) true
      else if(l>=r) false
      else if(a(mid)<value) scan(mid+1,r)
      else scan(l,mid-1)
    }
    scan(0,len)
  }
 
  def main(args:Array[String]) = {
    readLine
    val s = readLine.split(" ").map(_.toInt)
    readLine
    val t = readLine.split(" ").map(_.toInt)
    val len = s.length-1
    println(t.count(i=> search(s,len,i) ))
  }
}