Rock - Hannah L. #34
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Rock - Hannah L. #34
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CheezItMan
reviewed
Jan 18, 2022
| @@ -1,8 +1,19 @@ | |||
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| from heaps.min_heap import MinHeap | |||
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| def heap_sort(list): | |||
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👍 Since you are building a heap here, the space complexity is O(n) because you build a heap of n elements.
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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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| node = HeapNode(key, value) | ||
| self.store.append(node) | ||
| self.heap_up(len(self.store) -1) | ||
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| def remove(self): |
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| def empty(self): | ||
| """ This method returns true if the heap is empty | ||
| Time complexity: ? | ||
| Space complexity: ? | ||
| Time complexity: O(1) | ||
| Space complexity: O(1) | ||
| """ | ||
| pass | ||
| return len(self.store) == 0 |
| parent = (index -1) // 2 | ||
| if self.store[index].key < self.store[parent].key: | ||
| self.swap(index, parent) | ||
| self.heap_up(parent) | ||
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| def heap_down(self, index): |
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Heaps Practice
Congratulations! You're submitting your assignment!
Comprehension Questions
heap_up&heap_downmethods useful? Why?