Covered Walkway Time Limit: 10000ms Memory Limit: 131072KB This problem will be judged on HDU. Original ID: 425864-bit integer IO format: %I64d      Java class name: Main   Your university wants to build a new walkway, and they want at least part of…

Covered Walkway Problem Description   Your university wants to build a new walkway, and they want at least part of it to be covered. There are certain points which must be covered. It doesn’t matter if other points along the walkway are covered or no…

题目大意: 一个N个点的序列,要将他们全部覆盖,求总最少费用:费用计算: c+(x-y)2 分析: 斜率优化DP 我们假设k<j<i.如果在j的时候决策要比在k的时候决策好,那么也是就是dp[j]+M+(sum[i]-sum[j])^2<dp[k]+M+(sum[i]-sum[k])^2.(因为是最小花费嘛,所以优就是小于) 两边移项一下,得到:(dp[j]+num[j]^2-(dp[k]+num[k]^2))/(2*(num[j]-num[k]))<sum[i].我们把dp[j]…

Covered Walkway Time Limit: 30000/10000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others) Total Submission(s): 1273    Accepted Submission(s): 491 Problem Description Your university wants to build a new walkway, and they want at least…

CodeForces 429B  Working out 预处理出从四个顶点到某个位置的最大权值,再枚举相遇点,相遇的时候只有两种情况,取最优解即可. #include<iostream> #include<vector> #include<cmath> #include<map> #include<algorithm> #include<cstring> #include<cstdio> #include<cstd…

Covered Walkway Time Limit: 30000/10000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 1496    Accepted Submission(s): 602 Problem Description Your university wants to build a new walkway, and they want at least p…

Walkway.js 是一个使用线条和路径元素组成 SVG 动画图像的简单方法.只需根据提供的配置对象创建一个新的 Walkway 实例就可以了.这种效果特别适合那些崇尚简约设计风格的网页.目前, Walkway.js 仅适用于路径和线条元素. 效果演示     插件下载 如何使用: 根据提供的配置选项创建一个 Walkway 示例,如果想要开始动画效果,调用 draw 方法即可. // Create a new instance var svg = new Walkway(options);…

传送门:BNUOJ 52325 Increasing or Decreasing题意:求[l,r]非递增和非递减序列的个数思路:数位dp,dp[pos][pre][status] pos:处理到第几位 pre:前一位是什么 status:是否有前导零 递增递减差不多思路,不过他们计算的过程中像5555,444 这样的重复串会多算,所以要剪掉.个数是(pos-1)*9+digit[最高位],比如一位重复子串是:1,2,3,4...9,9个,二位重复子串:11,22,33,44,...,99,9个:…

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">  <modelVers…

问题现象: 在Eclipse(JEE mars)中新建maven project,选择archetype为:maven-archetype-plugin,结果生成的project存在错误:“Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-plugin-plugin:3.2:descriptor (execution: default-descriptor, phase:…