C - Align Time limit : 2sec / Memory limit : 1024MB Score : 400 points Problem Statement You are given N integers; the i-th of them is Ai. Find the maximum possible sum of the absolute differences between the adjacent elements after arranging these i…

链接 Tenka1 Programmer Contest C - Align 给定一个序列,要求重新排列最大化\(\sum_{i=2}^{i=n} |a_i-a_{i-1}|\),\(n\leq 10^5\) 小清新贪心,首先把最大的先放好,然后依次考虑下面四种决策: 左边放最小,右边放最小,左边放最大,右边放最大. 每次取\(max\)并更新左右端点,这样一定能取到最大最小的波浪形态,最大值旁边放两个最小不会更差. #include<bits/stdc++.h> #define R regi…

Markdown 基本语法 段落 非常自然,一行文字就是一个段落. 比如: 这是一个段落 会被解释成: <p>这是一个段落.</p> 如果你需要另起一段,请在两个段落之间隔一个空行. 这是一个段落. 这是另一个段落. 会被解释成 <p>这是一个段落</p> <p>这是另一个段落</p> 不隔一个空行的换行行为,在一些编辑器中被解释为换行,即插入一个标签.对与另外一些编辑器,会被解释为插入一个空格.对于后者,若要插入换行标签,请在当前一…

Description Aliens on planet Pandora also write computer programs like us. Their programs only consist of capital letters (‘A’ to ‘Z’) which they learned from the Earth. On planet Pandora, hackers make computer virus, so they also have anti-virus sof…

题意:在连通图中,求一条边使得加入这条边以后的消除的桥尽量多. 在同一个边双连通分量内加边肯定不会消除桥的, 求边双连通分量以后缩点,把桥当成边,实际上是要选一条最长的链. 缩点以后会形成一颗树,一定不存在环否则和桥的定义矛盾,求树上的最远点对. 树上的最远点对用dp TLE了,实际上两次dfs就行了,第一次随便选一个点dfs找到最远的点, 再从那个点dfs找最远的点就是树上的最远点对,为什么这样是对的呢?反向来构造,假设已经找了最长的链, 往链上某点上添加一条链,这条链的长度一定小于这个点到两…

Rigid Frameworks Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 337    Accepted Submission(s): 273 Problem Description Erik Demaine is a Professor in Computer Science at the Massachusetts Insti…

Subway Time Limit: 7000/3500 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 860    Accepted Submission(s): 126Special Judge Problem Description jiefangxuanyan and yiyi cat are universally acknowledged model couple…

Shanghai Regional Online Contest 1004 In the ACM International Collegiate Programming Contest, each team consist of three students. And the teams are given 5 hours to solve between 8 and 12 programming problems. On Mars, there is programming contest,…

Computer Virus on Planet Pandora Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 256000/128000 K (Java/Others)Total Submission(s): 2578    Accepted Submission(s): 713 Problem Description     Aliens on planet Pandora also write computer progra…

Gym 100935F A Poet Computer Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Description standard input/output The ACM team is working on an AI project called (Eih Eye Three) that allows computers to write poems. One of th…