MinHeap and MaxHeap realisations are broken

[Boiarshinov]

MinHeap and MaxHeap implementation are broken.
Instance of these heaps couldn't be instanciated with any not empty list of elements.

Here is a test code to reproduce:

@Test
void createFromList() {
    var elements = List.of(
            new HeapElement(5)
    );
    MaxHeap heap = new MaxHeap(elements);
    //similar with MinHeap
}

Stacktrace:

java.lang.IndexOutOfBoundsException: Index -1 out of bounds for length 1

	at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
	at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
	at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266)
	at java.base/java.util.Objects.checkIndex(Objects.java:359)
	at java.base/java.util.ArrayList.get(ArrayList.java:427)
	at com.thealgorithms.datastructures.heaps.MaxHeap.getElementKey(MaxHeap.java:46)
	at com.thealgorithms.datastructures.heaps.MaxHeap.toggleUp(MaxHeap.java:59)
	at com.thealgorithms.datastructures.heaps.MaxHeap.insertElement(MaxHeap.java:97)
	at com.thealgorithms.datastructures.heaps.MaxHeap.<init>(MaxHeap.java:20)

[Boiarshinov]

This issue could be a good_first_issue for newcomers. I'm not pretend to solve it by myself 😄

[Jainam1401]

@Boiarshinov Sir, I am new to the Open Source contribution, can you assign me the issue if no one is working on the issue?

[Jainam1401]

@siriak Thanks for assigning me the issue. Can you please help me know this issue better and steps I need to follow to make contribution?

[siriak]

You need to make a fork of this repo, then make changes in it, and then make a pull request from your fork to this repo

[Jainam1401]

@siriak Thanks for the help.

[Jainam1401]

@siriak I have made the changes to the code but when I try to run it, I am facing some dependencies issue. Can you please help me out with it?