Контрольная работа 2 - #36
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EStarikov wants to merge 2 commits into
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Godrik0
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Dec 18, 2025
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- -10 баллов за
merge - -2 балла за
extract_min
Итого 18/30
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| def merge(self): | ||
| self.roots.sort(key=lambda x: x.degree) | ||
| i = 0 | ||
| while i < len(self.roots) - 1: | ||
| a, b = self.roots[i], self.roots[i+1] | ||
| if a.degree == b.degree: | ||
| if a.key < b.key: | ||
| b.sibling = a.child | ||
| a.child = b | ||
| b.parent = a | ||
| a.degree += 1 | ||
| self.roots.pop(i + 1) | ||
| else: | ||
| a.sibling = b.child | ||
| b.child = a | ||
| a.parent = b | ||
| b.degree += 1 | ||
| self.roots.pop(i) | ||
| else: | ||
| i += 1 |
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merge сливает две кучи в одну, а здесь что-то странное
| self.roots = [] | ||
|
|
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| def merge(self): | ||
| self.roots.sort(key=lambda x: x.degree) |
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Сортировка полностью лишает смысла структуру, потому что алгоритмическая сложность значительно возрастает
| minimum = self.roots[i].key | ||
| ind_min = i | ||
| if self.roots[ind_min].child is not None: | ||
| self.roots.append(self.roots[ind_min].child) |
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Вы добавляете ребенка в конец списка, обычно они хранятся в начале списка и сейчас всё работает верно, только потому что в merge выполняется сортировка.
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