Solution: Replace Words
Explore how to use a trie to replace words in a sentence with their shortest matching prefixes from a given dictionary. Understand the process of constructing a trie and leveraging it to efficiently find prefixes, reducing search time complexity. This lesson helps you implement an optimized solution to prefix replacement problems commonly encountered in coding interviews.
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Statement
In this problem, we are considering the words that are composed of a
You’re given a dictionary, dictionary, consisting of prefixes, and a sentence, sentence, which has words separated by spaces only. Your task is to replace the postfix in sentence with their prefixes given in dictionary (if found) and return the modified sentence.
A couple of points to keep in mind:
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If a postfix in the sentence matches more than one prefix in the dictionary, replace it with the prefix that has the shortest length. For example, if we have the sentence “iphone is amazing”, and the dictionary {“i”, “ip”, “hone”}, then the word “iphone” has two prefixes in the dictionary “i” and “ip”, but we will replace it with the one that is shorter among the two, that is, “i”.
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If there is no root word against any word in the sentence, leave it unchanged.
Constraints:
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dictionary.length -
dictionary[i].length dictionary[i]consists of only lowercase letters.-
sentence.length