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0030. Substring with Concatenation of All Words (H)
Substring with Concatenation of All Words (H) 题目 You are given a string, s, and a list of words, words, that are all of the same length. Find all star ...
分类:其他好文   时间:2020-06-25 21:20:39    阅读次数:56
0030. Substring with Concatenation of All Words (H)
Substring with Concatenation of All Words (H) 题目 You are given a string, s, and a list of words, words, that are all of the same length. Find all star ...
分类:其他好文   时间:2020-06-24 12:04:23    阅读次数:38
多字段查询优化 (like 放弃 or )
--方式1AND CASE WHEN new_imei LIKE @imei THEN 1 WHEN new_enterimei LIKE @imei THEN 1 ELSE 0 END = 1 --方式2AND CASE WHEN SUBSTRING(new_imei,0,LEN(@imei)+1 ...
分类:其他好文   时间:2020-06-24 11:44:36    阅读次数:78
词典中最长的单词
解题思路排序之后就是字典序了,遇到单个字符,加到集合里,多个字符则看最后一个字符之前的字符是否已经在集合里,在的话,加进集合里,不在的话,可以直接不管了,因为已经排序,说明肯定无法一步一步的达到这个字符串,再用两个变量,保存首次遇到的最长长度,最后返回(有点重复代码) class Solution: ...
分类:其他好文   时间:2020-06-24 00:45:38    阅读次数:82
查询Sql慢语句
SELECT TOP 10 execution_count as [Number Of Executions],total_worker_time/execution_count as [Average CPU Time],total_elapsed_time/execution_count as ...
分类:数据库   时间:2020-06-23 11:38:09    阅读次数:93
Mysql单行字段拆分多行
SQL单行拆分多行 不需要自建自增的辅助表,Mysql自带help_topic可以使用; SELECT SUBSTRING_INDEX( SUBSTRING_INDEX( target_column, ',', b.help_topic_id + 1 ), ',', -1 ) AS coop_bra ...
分类:数据库   时间:2020-06-22 17:10:46    阅读次数:86
LeetCode(力扣)5月「每日 1 题」
3. Longest Substring Without Repeating Characters ...
分类:其他好文   时间:2020-06-21 20:03:36    阅读次数:43
[LeetCode] 1044. Longest Duplicate Substring
Given a string S, consider all duplicated substrings: (contiguous) substrings of S that occur 2 or more times. (The occurrences may overlap.) Return a ...
分类:其他好文   时间:2020-06-20 13:20:54    阅读次数:43
LC 1044. Longest Duplicate Substring
link class Solution { public: const int mod=1E9+7; vector<long long> powerof26; string longestDupSubstring(string S) { int n=S.size(); powerof26.resiz ...
分类:其他好文   时间:2020-06-20 10:58:13    阅读次数:40
【MySQL】字符串截取函数substring_index
本文主要介绍MySQL中字符串截取函数substring_index(str,delim,count)的使用方法。 ...
分类:数据库   时间:2020-06-19 21:06:29    阅读次数:65
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