Is it always true that the bottom-up and top-down algorithms yield the same heap for the sameinput? (10 p.
Question
Is it always true that the bottom-up and top-down algorithms yield the same heap for the same input? (10 p.)
Solution
No, it is not always true that the bottom-up and top-down algorithms yield the same heap for the same input.
Here's why:
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The bottom-up algorithm builds the heap by repeatedly inserting the next input item into the heap constructed so far. It starts by considering the input items one at a time, in the order they are given in the input, and inserts each item into the heap.
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The top-down algorithm, on the other hand, starts with an empty heap and inserts the input items one at a time. However, it does not necessarily insert the items in the order they are given in the input. Instead, it inserts each item in the position that maintains the heap property.
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Because the two algorithms insert items in different orders, they can construct different heaps from the same input. For example, if the input is a sequence of numbers in increasing order, the bottom-up algorithm will construct a heap where each number is the parent of the next larger number, while the top-down algorithm will construct a heap where each number is the child of the next larger number.
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Therefore, while both algorithms will construct a valid heap from any input, they do not necessarily construct the same heap.
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