Paper- Saejin#47
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CheezItMan
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Jan 28, 2022
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Nice work Saejin, you hit the learning goals here. Well done. Take a look at my feedback and let me know what questions you have.
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| def heap_sort(list): | ||
| """ This method uses a heap to sort an array. | ||
| Time Complexity: ? | ||
| Space Complexity: ? | ||
| Time Complexity: Onlogn | ||
| Space Complexity: On | ||
| """ |
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| def add(self, key, value = None): | ||
| """ This method adds a HeapNode instance to the heap | ||
| If value == None the new node's value should be set to key | ||
| Time Complexity: ? | ||
| Space Complexity: ? | ||
| Time Complexity: O log n | ||
| Space Complexity: O 1 |
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| def remove(self): | ||
| """ This method removes and returns an element from the heap | ||
| maintaining the heap structure | ||
| Time Complexity: ? | ||
| Space Complexity: ? | ||
| Time Complexity: O log n | ||
| Space Complexity: O 1 | ||
| """ |
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👍 , However the space complexity is O(log n) because of heap_down's recursive call stack
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| def empty(self): | ||
| """ This method returns true if the heap is empty | ||
| Time complexity: ? | ||
| Space complexity: ? | ||
| Time complexity: On | ||
| Space complexity: O1 | ||
| """ |
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👍 However the time complexity is O(1)
| return len(self.store) == 0 | ||
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| def heap_up(self, index): |
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| def heap_down(self, index): | ||
| """ This helper method takes an index and | ||
| moves the corresponding element down the heap if it's | ||
| larger than either of its children and continues until | ||
| the heap property is reestablished. | ||
| """ |
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Heaps Practice
Congratulations! You're submitting your assignment!
Comprehension Questions
heap_up&heap_downmethods useful? Why?