how to determine if the kth largest element of the heap is greater than x

Question

Consider a binary heap containing n numbers (the root stores the greatest number). You are given a positive integer k < n and a number x. You have to determine whether th

Answer 1

public class KSmallest2 {

private MinPQ minHeap;
private int x;
private int k;
private int count = 0;

public KSmallest2(String filename, int x, int k) {
    this.x = x;
    this.k = k;
    minHeap = new MinPQ<>();
    try {
        Scanner in = new Scanner(new File(filename));
        while (in.hasNext()) {
            minHeap.insert(in.nextInt());
        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
}

public boolean check(int index) {

    if (index > minHeap.size()) {
        return false;
    }

    if (minHeap.getByIndex(index) < x) {
        count++;
        if (count >= k) {
            return true;
        }

        return  check(2 * index) ||
                check(2 * index + 1);
    }

    return false;
}



public static void main(String[] args) {
    KSmallest2 ks = new KSmallest2("src/main/resources/minheap.txt", 18, 5);
    System.out.println(ks.minHeap);

    System.out.println(ks.check(1));
}

}