题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5115 Dire Wolf Time Limit: 5000/5000 MS (Java/Others)Memory Limit: 512000/512000 K (Java/Others) 问题描述 Dire wolves, also known as Dark wolves, are extraordinarily large and powerful wolves. Many, if not…

Dire Wolf Time Limit: 5000/5000 MS (Java/Others)    Memory Limit: 512000/512000 K (Java/Others)Total Submission(s): 2221    Accepted Submission(s): 1284 Problem Description Dire wolves, also known as Dark wolves, are extraordinarily large and powerfu…

渐渐认识到区域赛更侧重的是思维及基本算法的灵活运用,而不是算法的量(仅个人见解),接下来要更多侧重思维训练了. 区间DP,dp[i][j]表示从i到j最终剩余第i 与第j只的最小伤害值,设置0与n+1两个虚拟的狼,状态转移方程如下: dp[i][j] = min(dp[i][j], dp[i][k] + dp[k][j] + b[i] + b[j]) #include<cstdio> #include<iostream> #include<cstdlib> #inclu…

考虑先枚举所有的物品中最后拿走的,这样就分成了2个子问题,即先拿完左边的,再拿完右边的,最后拿选出的那个.令dp(i,j)表示拿完[i,j]所有物品的最小代价.你可能会说,我们拿[i,j]这一段物品的时候,i左边和j右边的第一个物品可能会不断变化,影响i和j的最终价格.其实是不会的,还是想想一开始说的整个序列枚举最后被拿走的,然后不断分割成子问题的过程,我们都是先拿走[i,j]中的所有元素,之后才会去动i-1或者j+1.所以可以澄清一下dp状态含义:dp(i,j)表示原序列中把[i,j]中的元素…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5115 题目大意:有一些狼,从左到右排列,每只狼有一个伤害A,还有一个伤害B.杀死一只狼的时候,会受到这只狼的伤害A和这只狼两边的狼的伤害B的和.若两只狼之间的狼都被杀了,这两只狼也算相邻.求杀掉一排狼的最小代价.解题思路:设dp[i][j]为消灭编号从i到j只狼的代价,那么结果就是dp[1][n]枚举k作为最后一只被杀死的狼,此时会受到a[k]和b[i-1] b[j+1]的伤害 取最小的即可.可列出…

也写了好几天的区间DP了,这里稍微总结一下(感觉还是不怎么会啊!). 但是多多少少也有了点感悟: 一.在有了一点思路之后,一定要先确定好dp数组的含义,不要模糊不清地就去写状态转移方程. 二.还么想好...想到了再加上去.... 之前也看了别人的总结,也给出了不少区间DP的模板.这里我也贴一下基本的模板: 区间DP模板 ; len < n; len++) { //操作区间的长度 ; i+len <= n; i++) { //始末 int j=i+len; //检查是否匹配(非必须) for (…

Dire wolves, also known as Dark wolves, are extraordinarily large and powerful wolves. Many, if not all, Dire Wolves appear to originate from Draenor. Dire wolves look like normal wolves, but these creatures are of nearly twice the size. These powerf…

Problem Description Dire wolves, also known as Dark wolves, are extraordinarily large and powerful wolves. Many, if not all, Dire Wolves appear to originate from Draenor. Dire wolves look like normal wolves, but these creatures are of nearly twice th…

Dire Wolf Time Limit: 5000/5000 MS (Java/Others)    Memory Limit: 512000/512000 K (Java/Others)Total Submission(s): 3815    Accepted Submission(s): 2266 Problem Description Dire wolves, also known as Dark wolves, are extraordinarily large and powerfu…

题意 就是有一对狼,每个狼有初始的攻击力,并且还能给左右两边的狼提供攻击力加成,当冒险家杀死一头狼的时候他也会受到这个狼目前攻击力的伤害 实例解析 33 5 78 2 0 有三头狼,刚开始第二头狼给他左右两边的狼各加2攻击力,由于第一头狼左边没有狼,所以只给第二头狼加,第三头狼还那样,一系列操作后攻击力为(5,13,9),从左往右杀死狼 1.受到5点攻击,且第二头狼的攻击力加成消失(5,9) 2.受到5点攻击,且第三头狼攻击加成消失(7) 3最后结果5+5+7=17 题解 dp[i][j]=mi…