问题描述:判断数组中是否存在<ai aj> abs(ai - aj)<=t && abs(i - j) <=k; 问题分析:需要一个数据结构来维护满足条件k。单纯暴力,会超时。假设当前元素num[i]我只需要判断 i- k -1 到 i之间的元素的关系就可以了。假设当前元素是num[i], 另一个元 ...
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其他好文 时间:
2016-04-16 18:33:09
阅读次数:
133
介绍 本篇文章主要介绍在插入数据到表中遇到键重复避免插入重复值的处理方法,主要涉及到IGNORE,ON DUPLICATE KEY UPDATE,REPLACE;接下来就分别看看这三种方式的处理办法。 IGNORE 使用ignore当插入的值遇到主键(PRIMARY KEY)或者唯一键(UNIQUE ...
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数据库 时间:
2016-04-15 09:27:48
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411
在build.gradle中与compileSdkVersion **、buildToolsVersion “**.**.*"或defaultConfig 同级添加如下代码 ...
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编程语言 时间:
2016-04-14 15:53:23
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168
Write a SQL query to delete all duplicate email entries in a table named Person, keeping only unique emails based on its smallest Id. For example, aft ...
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其他好文 时间:
2016-04-09 12:15:14
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187
Given a linked list and two values v1 and v2. Swap the two nodes in the linked list with values v1 and v2. It's guaranteed there is no duplicate value ...
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其他好文 时间:
2016-04-07 08:17:16
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120
Write a SQL query to find all duplicate emails in a table named Person. For example, your query should return the following for the above table: Note: ...
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其他好文 时间:
2016-04-07 07:09:55
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140
Given a list of numbers that may has duplicate numbers, return all possible subsets Notice Each element in a subset must be in non-descending order. T ...
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其他好文 时间:
2016-04-07 07:04:43
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133
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. Example Given 1->2->3- ...
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其他好文 时间:
2016-04-04 17:53:23
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216
Given a list of numbers with duplicate number in it. Find all unique permutations. Example For numbers [1,2,2] the unique permutations are: [ [1,2,2], ...
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其他好文 时间:
2016-04-04 16:19:47
阅读次数:
100