学习了一下凸优化DP,感觉挺有意思的 首先把所有点对称到左下角,然后以每个点为顶点画等腰直角三角形,将被覆盖的点去掉,现在所有点从左上到右下横纵坐标都是递增的,设坐标为$(x_{1\cdots M},y_{1\cdots M})$ 设$f_{j,i}$表示拍$j$次照片覆盖$i$个点的最少覆盖方格数,枚举最后一个矩形覆盖到之前的哪个点,有$f_{j,i}=\min\limits_{0\leq k\lt i}f_{j-1,k}+\left(y_i-x_{k+1}+1\right)^2-\max\l…

Dr. Ellie Arroway has established contact with an extraterrestrial civilization. However, all efforts to decode their messages have failed so far because, as luck would have it, they have stumbled upon a race of stuttering aliens! Her team has found…

题目 Source http://acm.hdu.edu.cn/showproblem.php?pid=4080 Description Dr. Ellie Arroway has established contact with an extraterrestrial civilization. However, all efforts to decode their messages have failed so far because, as luck would have it, the…

UVA 12206 - Stammering Aliens 题目链接 题意:给定一个序列,求出出现次数大于m,长度最长的子串的最大下标 思路:后缀数组.搞出height数组后,利用二分去查找就可以 这题之前还写过hash的写法也能过,只是写后缀数组的时候,犯了一个傻逼错误,把none输出成node还一直找不到...这是刷题来第二次碰到这样的逗比错误了,还是得注意. . 代码: #include <cstdio> #include <cstring> #include <alg…

Stammering Aliens Time Limit: 2000MS   Memory Limit: 65536K       Description Dr. Ellie Arroway has established contact with an extraterrestrial civilization. However, all efforts to decode their messages have failed so far because, as luck would hav…

Aliens Aliens作为游戏设定中入侵的外星人,有各式外貌及奇特的战斗方式,掌握一些高能科技或利用精神力量进行攻击 Sectoid 使用灵能战斗的外星人,并无高级版本,初级便会使用精神控制,生命值较少. 能力:精神控制 召唤僵尸 眩晕目标(闪光弹效果,移动力.命中率大幅降低,无法使用部分能力) 恐慌目标 AI行为模式及策略:防御型 1.选择离玩家单位一定距离的掩体躲避 2.优先使用灵能(召唤僵尸优先级最大) 3.极少使用主武器 设计分析: Aliens中最基础的,定位偏向于“杂兵”的单位,…

Problem UVA1616-Caravan Robbers Accept: 531  Submit: 2490Time Limit: 3000 mSec Problem Description Input Input will start with a positive integer, N (3 ≤ N ≤ 500) the number of aliens. In next few lines there will be N distinct integers from 1 to N i…

题目大意:将一个1~n的环形排列变成升序的,最少需要几次操作?每次操作可以交换任意两个数字. 题目分析:枚举出1的位置.贪心策略:每次操作都保证至少一个数字交换到正确位置上. # include<iostream> # include<cstdio> # include<cstring> # include<algorithm> using namespace std; int a[2000],head,tail,n,b[505]; bool ok(int…

However, all efforts to decode their messages have failed so far because, as luck would have it, they have stumbled upon a race of stuttering aliens! Her team has found out that, in every long enough message, the most important words appear repeated…

*IX. P5896 [IOI2016]aliens DP 优化方法大杂烩,详解 wqs 二分及其注意事项,斜率优化等其它 DP 优化方法. **** 团队赛 T6,没想到是 IOI 原题.当时看出来要用 wqs 二分,但是我没学过(经常发生知道要用某种算法但是不会写的情况),因此最近学习了一下 wqs 二分.找题目练手的时候看到了这题,世 界 线 收 束.做题的过程中发现还要用到斜率优化,于是也学了一下. 这算是一道比较套路的题目,但套路并不意味这不是好题,毕竟我从中学到了 wqs 二分和斜率…