Now I think you have got an AC in Ignatius.L's "Max Sum" problem. To be a brave ACMer, we always challenge ourselves to more difficult problems. Now you are faced with a more difficult problem.  Given a consecutive number sequence S 1, S 2, S 3,…

HDU 1087 题目大意:给定一个序列,只能走比当前位置大的位置,不可回头,求能得到的和的最大值.(其实就是求最大上升(可不连续)子序列和) 解题思路:可以定义状态dp[i]表示以a[i]为结尾的上升子序列的和的最大值,那么便可以得到状态转移方程 dp[i] = max(dp[i], dp[j]+a[i]), 其中a[j]<a[i]且j<i; 另外每个dp[i]可以先初始化为a[i] 理解:以a[i]为结尾的上升子序列可以由前面比a[i]小的某个序列加上a[i]来取得,故此有dp[j]+a[…

HDOJ_1087_Super Jumping! Jumping! Jumping! [DP] Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 44670 Accepted Submission(s): 20693 Problem Description Nowadays, a kind of chess game called "Super…

原标题:[DP专辑]ACM动态规划总结 转载自 http://blog.csdn.net/cc_again?viewmode=list http://blog.csdn.net/cc_again/article/category/1261899 动态规划一直是ACM竞赛中的重点,同一时候又是难点,由于该算法时间效率高,代码量少,多元性强,主要考察思维能力.建模抽象能力.灵活度. ***********************************************************…

Kattis - honey[DP] 题意 有一只蜜蜂,在它的蜂房当中,蜂房是正六边形的,然后它要出去,但是它只能走N步,第N步的时候要回到起点,给出N, 求方案总数 思路 用DP 因为N == 14 所以 最多走7步 我们不妨设 (7, 7) 为原点,然后 dp[0][7][7] = 1 因为 N == 0 的时候 方案数只有一个 那就是 不动吧.. dp[i][j][k] i 代表第几步 j k 分别表示 目前的位置 一个点 在一张图里面本来有八个方向可以走 这里六边形 我们只取六个方向就可…

HDOJ 1423 Greatest Common Increasing Subsequence [DP][最长公共上升子序列] Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 8768 Accepted Submission(s): 2831 Problem Description This is a problem from ZOJ 24…

HDOJ 1501 Zipper [DP][DFS+剪枝] Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 10886 Accepted Submission(s): 3925 Problem Description Given three strings, you are to determine whether the third str…

HDOJ 1257 最少拦截系统 [DP] Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 50753 Accepted Submission(s): 19895 Problem Description 某国为了防御敌国的导弹袭击,发展出一种导弹拦截系统.但是这种导弹拦截系统有一个缺陷:虽然它的第一发炮弹能够到达任意的高度,但是以后每一发炮弹…

HDOJ 1159 Common Subsequence[DP] Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 44280 Accepted Submission(s): 20431 Problem Description A subsequence of a given sequence is the given sequence wit…

POJ_2533 Longest Ordered Subsequence[DP][最长递增子序列] Longest Ordered Subsequence Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 58448 Accepted: 26207 Description A numeric sequence of ai is ordered if a1 < a2 < - < aN. Let the subsequenc…