HDU - 3506 思路: 平行四边形不等式优化dp 这不就是石子归并(雾 代码: #pragma GCC optimize(2) #pragma GCC optimize(3) #pragma GCC optimize(4) #include<bits/stdc++.h> using namespace std; #define y1 y11 #define fi first #define se second #define pi acos(-1.0) #define LL long l…

http://acm.hdu.edu.cn/showproblem.php?pid=3506 四边行不等式:http://baike.baidu.com/link?url=lHOFq_58V-Qpz_nTDz7pP9xCeHnd062vNwVT830z4_aQoZxsCcRtac6CLzbPYLNImi5QAjF2k9ydjqdFf7wlh29GJffeyG8rUh-Y1c3xWRi0AKFNKSrtj3ZY7mtdp9n5W7M6BBjoINA-DdplWWEPSK#1 dp[i][j]表示第…

题意:有n个石堆排成环,每次能合并相邻的两堆石头变成新石堆,代价为新石堆石子数,问最少的总代价是多少 思路:先看没排成环之前怎么做:用dp[i][j]表示合并i到j所需的最小代价,那么dp[i][j]就是合并i~k.k+1~j的最小代价,即dp[i][j] = min(dp[i][j],dp[i][k] + dp[k + 1][j] + w[i][j]]). ; len <= n; len++){ //区间长度 ; i + len - <= n; i++){ //起始位置 ; //末尾位置 f…

HDU 1069 Monkey and Banana / ZOJ 1093 Monkey and Banana (最长路径) Description A group of researchers are designing an experiment to test the IQ of a monkey. They will hang a banana at the roof of a building, and at the mean time, provide the monkey with…

HDU 1069 Monkey and Banana 纵有疾风起 题目大意 一堆科学家研究猩猩的智商,给他M种长方体,每种N个.然后,将一个香蕉挂在屋顶,让猩猩通过 叠长方体来够到香蕉. 现在给你M种长方体,计算,最高能堆多高.要求位于上面的长方体的长要大于(注意不是大于等于)下面长方体的长,上面长方体的宽大于下面长方体的宽. 输入输出 开始一个数n,表示有多少种木块,木块的数量无限,然后接下来的n行,每行3个数,是木块的长宽高三个参量 输出使用这些在满足条件的情况下能够摆放的最大高度 解题思路…

http://acm.hdu.edu.cn/showproblem.php?pid=3506 题意:环形石子合并取最小值= =(n<=1000) #include <cstdio> #include <algorithm> using namespace std; const int N=2005, oo=~0u>>1; int a[N], w[N], d[N][N], s[N][N], n; int main() { while(~scanf("%d&…

环形石子合并问题. 有一种方法是取模,而如果空间允许的话(或者滚动数组),可以把长度为n个换拓展成长为2n-1的直线. #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> using namespace std; + ; const int INF = 0x3f3f3f3f; int n; int a[maxn], sum[maxn]; int d[max…

---恢复内容开始--- Monkey and Banana Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 13003    Accepted Submission(s): 6843 Problem Description A group of researchers are designing an experiment to te…

Monkey and Banana Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 1069 Description A group of researchers are designing an experiment to test the IQ of a monkey. They will hang a banana at the r…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1069 Problem Description A group of researchers are designing an experiment to test the IQ of a monkey. They will hang a banana at the roof of a building, and at the mean time, provide the monkey with so…