Leetcode 1032. Stream of Characters Trie树 题意 一个数据结构题,给定一个字典,初始化一个数据结构。每次查询是给一个字符,返回的信息是一个bool类型的。如果存在一个K,使得从当前字符开始往前看K个构建的字符串落在字典中,则返回true否则false 数据范围:1 <= words.length <= 2000,1 <= words[i]....
StreamChecker(words): Constructor, init the data structure with the given words. query(letter): returns true if and only if for somek >= 1, the lastkcharacters queried (in order from oldest to newest, including this letter just queried) spell one of the words in the given list. Example...
StreamChecker(words): Constructor, init the data structure with the given words. query(letter): returns true if and only if for somek >= 1, the lastkcharacters queried (in order from oldest to newest, including this letter just queried) spell one of the words in the given list. Example...
1032. Stream of Characters 信息门下皮卡丘 佛系皮卡丘 来自专栏 · Leetcode题解 给一个由字符组成stream, 问每次steam遇到的新字符和前面流过的字符组成的词是否出现在了给定的字典里。查字典用Trie。把所有出现过的字符记录下来存成一个字符串s,要求的是s末尾字符能否和前面组成词,正着给s断词非常麻烦。倒着...
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Stream流中有一个static <T><T> of(T... values) 通过数组获取: (Stream.of(arr)) 通过直接给多个数据的方式 函数拼接与终结方法 在上述介绍的各种方法中,凡是返回值仍然为Stream接口的为函数拼接方法,它们支持链式调用;而返回值不再为Stream接口的为终结方法,不再支持链式调用。如下表所示: ...
LeetCode Problems 一. 目录 #TitleSolutionAcceptanceDifficultyFrequency 0001 Two Sum Go 45.6% Easy 0002 Add Two Numbers Go 33.9% Medium 0003 Longest Substring Without Repeating Characters Go 30.4% Medium 0004 Median of Two Sorted Arrays Go 29.6% Hard 0005 Longest Palindromic Substring 29.4% Me...
LeetCode 1032. Stream of Characters Problem Description: Implement theStreamCheckerclass as follows: StreamChecker(words): Constructor, init the data structure with the given words. query(letter): returns true if and only if for somek >= 1, the lastkcharacters queried (in order from oldest ...
用字典树即可解决。首先在init的时候,把words中所有word逆置后存入字典树中;在query的时候,也有逆序的方式记录所有历史query过的值,同时判断其前缀是否存在于字典树中即可。 functionNode() {this.children= {} }classStreamChecker{constructor(words) {this.history=''this.root=newNode;for(letwordofwords) {this...
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