E - Multiplication Puzzle  POJ - 1651 这个题目没有特别简单,但是也没有我想象之中的那么难,这个题目时区间dp,因为我们是要对区间进行考虑的. 但是呢,这个也和动态规划的基本原理息息相关. 动态规划 我们一般需要去找这个的子问题,这个题目因为左端点和右端点是不能动 的,所以最后一个取走的就是a[l]*a[k]*a[r] 所以说这个题目的子问题就是每次去找一个区间,然后记录区间的左右端点,然后再找这个区间乘法最小和. dp[i][k]=min(dp[i][k],…

卡片游戏 题目大意:给你一排卡片,你可以从从中抽一些卡片(但是不能抽最左和最右的卡片),每张卡片上有一个数字,当你从中抽出一张卡片后,你将得卡片的数字和卡片左右两张卡片的数字的乘积的分数,问当剩下最左和最右两张卡片的时候,你可以得到的最小的分数? 这一题一看好像挺复杂的,但是如果我们换一个思维方式,这一题就会变得很熟悉 首先这一题是显而易见的DP(找最小值,不能取极限方式) 首先他要我们抽卡片是吧,一开始我们可能会想到先抽一张看看,然后在扫一遍其他卡片看能否抽,但是这样带来的直接后果就是,我们很…

解法 区间dp例题,长度从2开始到n结束起点从1到n,中间枚举的时候是看着左端点右端点与中点的乘积 代码 #include <iostream> #include <cstring> using namespace std; int dp[666][666],num[666]; int main() { ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); int n; cin>>n; memset(dp,0x7f,size…

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…

传送门:http://poj.org/problem?id=1651 Multiplication Puzzle Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 13109   Accepted: 8034 Description The multiplication puzzle is played with a row of cards, each containing a single positive intege…

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…

Multiplication Puzzle Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 10010   Accepted: 6188 Description The multiplication puzzle is played with a row of cards, each containing a single positive integer. During the move player takes one…

Multiplication Puzzle Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 7118   Accepted: 4385 Description The multiplication puzzle is played with a row of cards, each containing a single positive integer. During the move player takes one…

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 and the numb…

  http://poj.org/problem?id=1651Multiplication Puzzle   Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6188   Accepted: 3777 Description The multiplication puzzle is played with a row of cards, each containing a single positive integer.…