Description The multiplication puzzle is played with a row of cards, each containing a single positive integer. During the move player takes one card out of the row and scores the number of points equal to the product of the number on the card taken…

题目链接:http://poj.org/problem?id=1651 Description The multiplication puzzle is played with a row of cards, each containing a single positive integer. During the move player takes one card out of the row and scores the number of points equal to the prod…

题目链接:id=1651">点击打开链 题意: 给定一个数组,每次能够选择内部的一个数 i 消除,获得的价值就是 a[i-1] * a[i] * a[i+1] 问最小价值 思路: dp[l,r] = min( dp[l, i] + dp[i, r] + a[l] * a[i] * a[r]); #include <cstdio> #include <iostream> #include <algorithm> #include <queue>…

题目链接:https://vjudge.net/problem/POJ-1651 Multiplication Puzzle Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 11239   Accepted: 6980 Description The multiplication puzzle is played with a row of cards, each containing a single positive…

Multiplication Puzzle Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 9419 Accepted: 5850 Description The multiplication puzzle is played with a row of cards, each containing a single positive integer. During the move player takes one card…

ZOJ 3541 题目大意:有n个按钮,第i个按钮在按下ti 时间后回自动弹起,每个开关的位置是di,问什么策略按开关可以使所有的开关同时处于按下状态 Description There is one last gate between the hero and the dragon. But opening the gate isn't an easy task. There were n buttons list in a straight line in front of the gate…

Multiplication Puzzle Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 8737   Accepted: 5468 Description The multiplication puzzle is played with a row of cards, each containing a single positive integer. During the move player takes one…

比较特别的区间dp.小的区间转移大的区间时,也要枚举断点.不过和普通的区间dp比,断点有特殊意义.表示断点是区间最后取走的点.而且一个区间表示两端都不取走时中间取走的最小花费. #include <iostream> #include <cstdio> #include <cmath> #include <algorithm> #include <vector> #include <iomanip> #include <cstr…

LINK 每次删除一个数,代价是左右两边相邻的数的当前数的积 第一个和最后一个数不能删除 问最后只剩下第一个数的最后一个数的最小代价 思路 很简单的DP 正着考虑没有办法确定两边的数 那么就把每个区间内最后一次删除的数枚举出来,就可以确定左右两边的点是什么了 感觉挺对的 \(dp_{i,j}\)表示还有区间\([i,j]\)全部删完的最小代价,枚举一下最后删除的数然后直接统计贡献就可以了 #include<iostream> #include<cstdio> #include<…

题目链接:http://poj.org/problem?id=1651 题意:一系列的数字,除了头尾不能动,每次取出一个数字,这个数字与左右相邻数字的乘积为其价值, 最后将所有价值加起来,要求最小值. 这题容易会想到贪心就是先把最大的数先取出这样就能满足剩下的总价值尽可能的小,如果出现多个一样 的数时优先取走价值小的,但是如果有出现多个价值一样的话就不好处理了. 于是可以考虑一下用区间解决,区间转移大致是这样的 dp[j][j + i] = min(dp[j][j + i] , dp[j][k]…