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[jamiebase] WEEK 10 Solutions #2589
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| """ | ||
| # Approach | ||
| 노드를 방문하면서 왼쪽 자식, 오른쪽 자식을 서로 교체합니다. | ||
| 이 과정을 왼쪽/오른쪽 서브트리에 재귀적으로 반복합니다. | ||
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| # Complexity | ||
| - Time complexity: 모든 노드를 다 방문해야 하기 때문에 O(N) | ||
| - Space complexity: 재귀 호출 스택이 트리 높이만큼 쌓일 수 있기 때문에 O(H) | ||
| """ | ||
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| class Solution: | ||
| def invertTree(self, root: Optional[TreeNode]) -> Optional[TreeNode]: | ||
| if not root: | ||
| return None | ||
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| root.left, root.right = root.right, root.left | ||
| self.invertTree(root.left) | ||
| self.invertTree(root.right) | ||
| return root |
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🏷️ 알고리즘 패턴 분석
📊 시간/공간 복잡도 분석
피드백: 모든 노드를 한 번씩 방문하는 재귀적 트리 순회로 구현되어 있으며, 각 노드에서 교체 작업이 수행됩니다. 공간 복잡도는 재귀 호출 스택의 최대 높이인 트리 높이에 비례합니다.
개선 제안: 현재 구현이 적절해 보입니다.