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-''' Luis Andrés López Mañán
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- Program written by hand as a draft on 09/19/2022
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- Credit goes to GeeksForGeeks
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- Link: https://www.geeksforgeeks.org/python-program-for-heap-sort/
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- Last access on 09/19/2022
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- Program wrriten and edited on 10/10/2022
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-'''
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-
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-# This function heapifies a subtree rooted at an index
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-# i. Also, n is the size of a heap and arr is array.
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-
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-def heapify(lista, n, i):
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- # largest is root for now
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- largest = i
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-
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- # left child of root
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- l = 2 * i + 1
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-
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- # right child of root
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- r = 2 * i + 2
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-
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- # Checks if root has a left child and is greater
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- # than root
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- if l < n and lista[i] < lista[l] :
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- largest = l
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-
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- # Checks if root has a right child and is greater
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- # than root
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- if r < n and lista[largest] < lista[r]:
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- largest = r
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-
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- # If necessary, this changes root by swapping va-
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- # lues
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- if largest != i:
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- lista[i], lista[largest] = lista[largest], lista[i]
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-
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- # This heapifies the root repeatedly
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- heapify(lista, n, largest)
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