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我直接 DFS 就过了。罗马数字本身的长度就有限，最多 15，因此 DFS 的深度有限。用一个 Trie，每一步都看一下当前的路径在不在字典里。In Reply To:加个备忘录 Posted by:20053565 at 2008-03-31 14:19:43 Followed by: Post your reply here: |
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