예문을 실행한 결과 같은 값이 나오는데 왜 오답 처리 되는지 알 수가 없어 자문구합니다.
한 수 가르침 부탁 드립니다.
미리 답변에 감사드립니다.

import java.util.*;
import java.util.stream.Collectors;

public class Main {
static class Stone {
private int x,y;
private boolean checked;
public Stone(int x, int y) {
this.x = x;
this.y = y;
checked = false;
}
public Stone(String sx, String sy) {
this.x = Integer.parseInt(sx);
this.y = Integer.parseInt(sy);
checked = false;
}

public int getX() { return x; }
    public int getY() { return y; }
    public boolean getChecked() { return checked; }
    public void setChecked(boolean b) { this.checked = b; }
}

public static boolean isNearStone (Stone c, Stone n, int j) {
    if (n.getChecked()) return false;
    if (c.getX() == n.getX()) {
        return Math.abs(n.getY() - c.getY()) <= j;
    } else if (c.getY() == n.getY()) {
        return Math.abs(n.getX() - c.getX()) <= j;
    }
    return false;
}

public static String checkCrossWater (Stone sp, Stone ep, List<Stone> stones, int jump) {
    LinkedList<Stone> queue = new LinkedList<>();
    stones.add(ep);
    queue.add(sp);
    boolean isChecked = false;
    while (!queue.isEmpty() && !isChecked) {
        Stone curp = queue.pop();
        if (curp.getX() == ep.getX() && curp.getY() == ep.getY()) {
            isChecked = true;
            break;
        }
        List<Stone> finds = stones.stream().filter(p -> isNearStone(curp, p, jump)).collect(Collectors.toList());
        finds.stream().forEach(p -> p.setChecked(true));
        queue.addAll(finds);
    }

    if (isChecked) return "YES"; else return "NO";
}

public static void main (String[] args) {
    Scanner scan = new Scanner(System.in);
    List<String> result = new ArrayList<>();
    int casenum = Integer.parseInt(scan.nextLine());
    while (casenum > 0) {
        int jump = Integer.parseInt(scan.nextLine());
        String[] in1 = scan.nextLine().split(" ");
        Stone startp = new Stone(Integer.parseInt(in1[0]), Integer.parseInt(in1[1]));
        String[] in2 = scan.nextLine().split(" ");
        Stone endp = new Stone(Integer.parseInt(in2[0]), Integer.parseInt(in2[1]));
        int stoneCount = Integer.parseInt(scan.nextLine());
        List<Stone> stones = new ArrayList<>();
        while (stoneCount > 0) {
            String[] locs = scan.nextLine().split(" ");
            stones.add(new Stone(locs[0], locs[1]));
            stoneCount--;
        }
        result.add (checkCrossWater(startp, endp, stones, jump));
        casenum--;
    }
    scan.close();
    result.stream().forEach( it -> System.out.println (it) );
}

}