标签：split bre insert led bat his replace node battery
In English, we have a concept called root, which can be followed by some other words to form another longer word - let‘s call this word successor. For example, the root an, followed by other, which can form another word another.
Now, given a dictionary consisting of many roots and a sentence. You need to replace all the successor in the sentence with the rootforming it. If a successor has many roots can form it, replace it with the root with the shortest length.
You need to output the sentence after the replacement.
Example 1:
Input: dict = ["cat", "bat", "rat"] sentence = "the cattle was rattled by the battery" Output: "the cat was rat by the bat"
Note:
思路：字典树（Trie）
首先构建字典树，进行遍历，然后搜索；
class TrieNode(): def __init__(self): self.data = {} self.is_word = False class Trie(): def __init__(self): self.root = TrieNode() def insert(self, word): node = self.root for letter in word: child = node.data.get(letter) if not child: node.data[letter] = TrieNode() node = node.data[letter] node.is_word = True def search(self, word): string = ‘‘ node = self.root for letter in word: node = node.data.get(letter) if not node: break string += letter if node.is_word: return string return word class Solution(): def replaceWords(self, dict, sentence): """ :type dict: List[str] :type sentence: str :rtype: str """ trie = Trie() for word in dict: trie.insert(word) res = [] for word in sentence.split(): res.append(trie.search(word)) return ‘ ‘.join(res)
标签：split bre insert led bat his replace node battery
原文地址：http://www.cnblogs.com/yancea/p/7531774.html
