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tom4649
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Mar 26, 2026
| if node.left is not None: | ||
| node_to_visit.append((node.left, target_sum_at_this_node - node.val)) | ||
| if node.right is not None: | ||
| node_to_visit.append((node.right, target_sum_at_this_node - node.val)) |
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木探索は左の子からの探索が一般的ですが、stackを利用しているため、この順序を守りたい場合にはnode.rightを先にappendするのが良いと思いました
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https://leetcode.com/problems/path-sum/description/