思路:无非就是扫描一遍记录奇数和偶数各自的个数,比如为M和N,然后就是奇数里面选两个、偶数里面选两个,答案就是M(M-1)/2 + N(N-1)/2

Twitter OA prepare: even sum pairs的更多相关文章

  1. Twitter OA prepare: Rational Sum

    In mathematics, a rational number is any number that can be expressed in the form of a fraction p/q ...

  2. Twitter OA prepare: Two Operations

    准备T家OA,网上看的面经 最直接的方法,从target降到1,如果是奇数就减一,偶数就除2 public static void main(String[] args) { int a = shor ...

  3. Twitter OA prepare: Equilibrium index of an array

    Equilibrium index of an array is an index such that the sum of elements at lower indexes is equal to ...

  4. Twitter OA prepare: K-complementary pair

    2sum的夹逼算法,需要sort一下.本身不难,但是tricky的地方在于允许同一个数组元素自己跟自己组成一个pair,比如上例中的[5, 5].而且数组本身就允许值相等的元素存在,在计算pair时, ...

  5. Twitter OA prepare: Anagram is A Palindrome

    Algorithm: Count the number of occurrence of each character. Only one character with odd occurrence ...

  6. Twitter OA prepare: Visit element of the array

    分析:就是建立一个boolean array来记录array里面每个元素的访问情况,遇到访问过的元素就停止visiting,返回未访问的结点个数 public int visiting(int[] A ...

  7. Twitter OA prepare: Flipping a bit

    You are given a binary array with N elements: d[0], d[1], ... d[N - 1]. You can perform AT MOST one ...

  8. LC 677. Map Sum Pairs

    Implement a MapSum class with insert, and sum methods. For the method insert, you'll be given a pair ...

  9. [LeetCode] Map Sum Pairs 映射配对之和

    Implement a MapSum class with insert, and sum methods. For the method insert, you'll be given a pair ...

随机推荐

  1. 怎么使用jstack精确找到异常代码

    1.代码demo //一个CPU密集型线程的demo: package chapter1; public class FindJavaThreadInTaskManager { public stat ...

  2. libevent安装方法

    安装FastDFS之前,先安装libevent工具包,记录一下安装过程 1.检查:ls -al /usr/lib | grep libevent 查看是否已安装,如果已安装且版本低于1.3,则先通过: ...

  3. Linux下进程隐藏的方法及其对抗

    零.背景 在应急响应中,经常碰到ps命令和top命令查不到恶意进程(异常进程)的情况,会对应急响应造成很大的影响.轻则浪费时间,重则排查不出问题,让黑客逍遥法外.所以这篇博客研究学习如何对抗linux ...

  4. 在openLdap上添加memberOf属性

    我为openldap添加memberof属性的时候参考了这个文章:http://www.adimian.com/blog/2014/10/how-to-enable-memberof-using-op ...

  5. Mybatis generator使用小记

    Mybatis generator可以使用命令行,eclipse插件和maven配置实现自动生成代码的功能,主要来看看使用eclipse插件生成代码方法. 先安装插件: maven加载mysql驱动: ...

  6. Making Promises With

    转:Making Promises With http://www.htmlgoodies.com/beyond/javascript/making-promises-with-jquery-defe ...

  7. ElasticSearch在linux上安装部署(转)

    一.安装准备工作安装参考文档: ELK官网:https://www.elastic.co/ ELK官网文档:https://www.elastic.co/guide/index.html ELK中文手 ...

  8. Solve minGW g++ has stopped working 程序停止运行

    之前在机子装了个很早版本的MinGW,苦于不支持c++11,所以打算卸载掉安装个新版本的.可是网上找了很多版本装好后,编译成功,运行的时候总是弹出 *.exe has stopped working的 ...

  9. url写法细节

  10. 持续集成之jenkins

    代码部署规划 安装jenkins yum -y install java-1.8.0cd /etc/yum.repos.d/wget http://pkg.jenkins.io/redhat/jenk ...