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LeetCode Solution-56
56: Merge Intervals Given a collection of intervals, merge all overlapping intervals. Example 1: Example 2: 思路: 将区间的左端点按从小到大进行排序,然后观察相邻2个区间是否有公共部分,如果有 ...
分类:其他好文   时间:2020-01-30 21:10:18    阅读次数:62
Activity LifeCycle (安卓应用的运行机制)
测试回调代码 package com.example.hello; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; public class Mai ...
分类:移动开发   时间:2020-01-30 20:59:08    阅读次数:101
Meaning of Block size in tcode R3AC1
In tcode R3AC1 you can maintain block size for an adapter object. For example if you have 110 equipment to be downloaded from ERP, there would be 3 in ...
分类:其他好文   时间:2020-01-30 17:40:54    阅读次数:86
简单看看LongAccumulator
上篇博客我们看了AtomicLong和LongAdder的由来,但是有的时候我们想一下,LongAdder这个类也有点局限性,因为只能是每一次都+1,那有没有办法每次+2呢?或者每次乘以2?说得更抽象一点,我们能不能自己指定规则呢?干嘛老是傻乎乎的+1呢? 于是就有了LongAccumulator这 ...
分类:其他好文   时间:2020-01-30 17:06:53    阅读次数:57
1302. Deepest Leaves Sum
1302. Deepest Leaves Sum Given a binary tree, return the sum of values of its deepest leaves. Example 1: Input: root = [1,2,3,4,5,null,6,7,null,null,n ...
分类:其他好文   时间:2020-01-30 12:59:39    阅读次数:85
[LC] 270. Closest Binary Search Tree Value
Given a non-empty binary search tree and a target value, find the value in the BST that is closest to the target. Note: Given target value is a floati ...
分类:其他好文   时间:2020-01-30 12:32:09    阅读次数:67
[LeetCode] 938. Range Sum of BST
二叉搜索树的范围和。题意是给一个二叉搜索树和一个范围(L, R),请输出二叉搜索树里面所有node值介于L和R之间的node值的加和(sum)。例子, Example 1: Input: root = [10,5,15,3,7,null,18], L = 7, R = 15 Output: 32 E ...
分类:其他好文   时间:2020-01-30 10:09:53    阅读次数:66
LeetCode 466 - Count The Repetitions - Hard ( Python)
Define S = [s,n] as the string S which consists of n connected strings s. For example, ["abc", 3] ="abcabcabc". On the other hand, we define that stri ...
分类:编程语言   时间:2020-01-30 10:06:46    阅读次数:88
SQL基础
1. SELECT 2. Queries with constraints WHERE clause Operator | SQL Example : : | : : BETWEEN ... AND ... | clo_name BETWEEN 0.5 AND 1.5 NOT BETWEEN ... ...
分类:数据库   时间:2020-01-29 18:15:10    阅读次数:122
leedCode练题——9. Palindrome Number
1、题目 9. Palindrome Number Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example ...
分类:其他好文   时间:2020-01-29 17:47:22    阅读次数:55
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