题目连接:http://acm.hdu.edu.cn/showproblem.php?pid=4824 题意:中文,不解释 题解:双调欧几里德旅行商问题,具体可看dp双调欧几里德旅行商,这里注意的是起点为0,0. #include<cstdio> #define FFC(i,a,b) for(int i=a;i<=b;i++) ,inf=1e9; int dp[maxn][maxn],t,n; struct node{int x,y;}g[maxn]; ?a:-a;} int Min(i…

题意 给你一个长度为\(n\)的数组\(a\)和3个数字\(h,l和r\).\(t\)初始为0,每次可以使\(t=(t+a_i) \% h\)或者\(t=(t+a_i-1)\%h\),如果这时\(t\in\left[l,r\right]\)就将\(ans\)加1.求\(ans\)的最大值. 解题思路 这场比赛的题感觉偏简单了. 这是一道显而易见的DP题.\(dp_{i,j,k}\)表示枚举到\(a_i\),当前\(t=j\),是否-1时的\(ans\)的最大值,很容易就能推导出转移公式. AC代…

Disk Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1463    Accepted Submission(s): 189 Problem Description 有非常多从磁盘读取数据的需求,包含顺序读取.随机读取.为了提高效率,须要人为安排磁盘读取.然而.在现实中,这样的做法非常复杂. 我们考虑一个相对简单的…

pid=4175">HDU 4175 题意:有C座楼,每座楼有T个教室.一个人须要訪问C个教室.每座楼仅仅能訪问一个教室. 訪问教室须要消耗能量,从x点走到y点须要消耗abs(x-y)的能量,最后要走到目的点L,问最后走到目的点L须要消耗的最少能量. 思路:读清题意,用getchar()的方式去读.. 此外英文阅读水平比較拙计,亟待提升,以后不能再直接用有道翻译来做题了. 直接暴力枚举.用dp[i][j]表示class = i , classroom = j的所需最小能量. dp[i][j…

题目链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=3538 题意:如题. 题解: 假如 一组数据 ...(n1)A....(n2)A....(n2)   由于三部分为独立事件, 则总数为三部分相乘. (1)(3)易求,即3^n1, 3^n3,对于 (2), 当头尾相同(如样例) 可推出 an = 2an - 1 + 3an - 2; (a1 = 0, a2 = 3) 则 an =( 3(-1)^(n - 2) +…

UVA - 1025 A Spy in the Metro Secret agent Maria was sent to Algorithms City to carry out an especially dangerous mission. After several thrilling events we find her in the first station of Algorithms City Metro, examining the time table. The Algorit…

http://acm.hust.edu.cn/vjudge/problem/viewProblem.action?id=35913 Secret agent Maria was sent to Algorithms City to carry out an especially dangerous mission. Afterseveral thrilling events we find her in the first station of Algorithms City Metro, exam…

Disk Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2368    Accepted Submission(s): 333 Problem Description 有非常多从磁盘读取数据的需求,包含顺序读取.随机读取.为了提高效率,须要人为安排磁盘读取.然而.在现实中,这样的做法非常复杂. 我们考虑一个相对简单的…

A Scheduling Problem   Description There is a set of jobs, say x1, x2,..., xn <tex2html_verbatim_mark>, to be scheduled. Each job needs one day to complete. Your task is to schedule the jobs so that they can be nished in a minimum number of days. Th…

Description Bessie ≤ N ≤ ,,) hours (conveniently labeled ..N-) so that she produces as much milk as possible. Farmer John has a list of M ( ≤ M ≤ ,) possibly overlapping intervals ≤ starting_houri ≤ N), an ending hour (starting_houri < ending_houri ≤…