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package idiopen;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Scanner;

public class SquarePegs {

static Scanner sc;

public static void main(String[] args) throws FileNotFoundException {

//System.setIn(new FileInputStream("inputs/squarepegs.txt"));

sc = new Scanner(System.in);

new SquarePegs(sc.nextLine());

}

public SquarePegs(String input) {

String[] ins = input.split(" ");

int nrPlots = Integer.parseInt(ins[0]);

int nrCircles = Integer.parseInt(ins[1]);

int nrSquares = Integer.parseInt(ins[2]);

ArrayList<Integer> plots = new ArrayList<>();

//int circles[] = new int[nrCircles];

//float squares[] = new float[nrSquares];

ArrayList<Float> houses = new ArrayList<>();

for (int i = 0; i < nrPlots; i++) {

plots.add(sc.nextInt());

}

sc.nextLine();

for (int i = 0 ; i < nrCircles; i++) {

houses.add((float) sc.nextInt());

}

sc.nextLine();

for (int i = 0; i < nrSquares; i++) {

int sideLength = sc.nextInt();

double r = Math.sqrt(Math.pow(sideLength, 2) / 2);

houses.add((float) r);

//System.out.println("square l=" + sideLength + " gives r=" + r);

}

Collections.sort(plots);

Collections.sort(houses);

Collections.reverse(plots);

Collections.reverse(houses);

int filledPlots = 0;

for (Float house : houses) {

if (filledPlots >= plots.size()) {

break;

}

if (house < plots.get(filledPlots)) {

filledPlots++;

}

}

System.out.println(filledPlots);

}

}