1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
| def heapify(arr, n, i): largest = i l = 2 * i + 1 r = 2 * i + 2 if l < n and arr[i] < arr[l]: largest = l if r < n and arr[largest] < arr[r]: largest = r if largest != i: arr[i], arr[largest] = arr[largest], arr[i] heapify(arr, n, largest)
def heapSort(arr): n = len(arr) for i in range(n, -1, -1): print(i) heapify(arr, n, i) for i in range(n - 1, 0, -1): arr[i], arr[0] = arr[0], arr[i] heapify(arr, i, 0)
arr = [12, 11, 13, 5, 6, 7] heapSort(arr) print("排序后", arr)
|