Fix peek method in MaxHeap to prevent IndexError #173
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Updated the `peek` method to check if the heap contains at least one element before accessing `self.heap[1]`. This prevents a potential IndexError when the heap is empty.
Fix peek method to prevent IndexError
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Updated the
peekmethod to check if the heap contains at least one element before accessingself.heap[1].This prevents a potential IndexError when the heap is empty.