codechef COOLING http://www.codechef.com/problems/COOLING

gistfile1.txt

//codechef COOLING http://www.codechef.com/problems/COOLING
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Scanner;
import java.util.*;
public class Main{
    Scanner in;
    String INPUT = "";
    void solve() {

        int tc = ni();
        List<Integer> output = new ArrayList<Integer>();
        for(int i = 0; i < tc; i++) {
                int arrSize = ni();
                int[] pieArr = new int[arrSize];
                int[] rackArr = new int[arrSize];
                for(int j=0; j < pieArr.length;j++) {
                        pieArr[j] = ni();
                }
                for(int j=0; j < rackArr.length;j++) {
                        rackArr[j] = ni();
                }
                Arrays.sort(pieArr);
                Arrays.sort(rackArr);
                int currKIndex = 0;
                int count = 0;
                for(int j = 0; j < pieArr.length; j++) {
                        int k;
                        for( k = currKIndex ; k < rackArr.length; k++) {
                                if(pieArr[j] <= rackArr[k]) {
                                        count++;
                                        currKIndex = k+1;
                                        break;
                                }
    
                        }

                }
                System.out.println(count);
        }
    }
        void run() throws Exception
    {
        in = INPUT.isEmpty() ? new Scanner(System.in) : new Scanner(INPUT);
        solve();
    }
    public static void main(String[] args) throws Exception
    {
        new Main().run();
    }
    int ni() { return Integer.parseInt(in.next()); }
}