f(string pref, string suff)Returnsthe index of the word in the dictionary,which has the prefixprefand the suffixsuff. If there is more than one valid index, returnthe largestof them. If there is no such word in the dictionary, return-1. Example 1: Input["WordFilter", "f"] [[["ap...
}intf(stringprefix,stringsuffix) {if(!mp.count(prefix) || !ms.count(suffix))return-1; vector<int> pre = mp[prefix], suf =ms[suffix];inti = pre.size() -1, j = suf.size() -1;while(i >=0&& j >=0) {if(pre[i] < suf[j]) --j;elseif(pre[i] > suf[j]) --i;elser...
[Trie树] leetcode 745 Prefix and Suffix Search problem:https://leetcode.com/problems/prefix-and-suffix-search/ 使用两个Trie树,分别维护前缀树和后缀树,快速查找到所有满足条件的前缀字符串和后缀字符串,再一一比较同时满足前缀和后缀的(同时出现在两个查找结果中),取下标最大的。 classWordFilter {structTr...
技术标签: # KMP 字符串 LeetCodeA string is called a happy prefix if is a non-empty prefix which is also a suffix (excluding itself). Given a string s . Return the longest happy prefix of s . Return an empty string if no such prefix exists. Example 1: Input: s = "level" Output...
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def f(self, prefix, suffix): weight = -1 for word in self.prefixes[prefix] & self.suffixes[suffix]: if self.weights[word] > weight: weight = self.weights[word] return weight return cur[WEIGHT] # Your WordFilter object will be instantiated and called as such: ...
745 Prefix and Suffix Search 前缀和后缀搜索 Description: Design a special dictionary with some words that searchs the words in it by a prefix and a suffix. Implement the WordFilter class: WordFilter(string[] words) Initializes the object with the words in the dictionary. f(string prefix, ...
}if(path ==='_') flag =true; trie = trie[path]; trie.weight= flag ? weight : trie.weight; } }/** *@param{string} prefix *@param{string}suffix*@return{number} */WordFilter.prototype.f=function(prefix, suffix) {letpaths = suffix +'_'+ prefix;lettrie =this.trie;for(letpathof...
看到prefix和suffix,首先应该想到使用Trie这种数据结构的可能性,这道题涉及到后缀问题,所以我们需要设计一个函数rinsert来从单词最后一个字符开始创建Trie(insert函数和rinsert函数的差别仅仅在于遍历字符串的顺序相反而已)。因此tree是前缀树,rtree就成了后缀树。在TrieNode中,我还维护了一个last数组用于记录走过这个节点...
【leetcode】745. Prefix and Suffix Search 题目如下: Given manywords,words[i]has weighti. Design a classWordFilterthat supports one function,WordFilter.f(String prefix, String suffix). It will return the word with givenprefixandsuffixwith maximum weight. If no word exists, return -1....