magic balls Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 323    Accepted Submission(s): 90 Problem Description The town of W has N people. Each person takes two magic balls A and B every day.…

题意:求a数组的LIS,但是加了一个条件,为了LIS最大 b[i] a[i]可以交换.最多交换m次: 思路:我们令dp[i][j][l]表示i在最长上升子序列中,已经损失j点能量,第i个人转换了ai和bi的最长上升子序列的数目,可以得到方程 dp[i][j][0]=max{dp[k][j][0](a[k]<a[i])+1,dp[k][j][1](b[k]<a[i])+1},dp[i][j][1]=max(dp[k][j-1][0](a[k]<b[i])+1,dp[k][j-1][1](b…

hdu 1153 magic bitstrings 题目大意 一个质数p,现在让你求一个p-1长度的“01魔法串”.关于这个魔法串是这么定义的:     我们现在把这个串经过一段处理变成一个长宽均为p-1的矩阵,对于第i行的串,是由原来的串按每i位取得的.如果这个矩阵每行的串满足:和原来的串相等或是原来的串按位取反,我们就称这个串是魔法串.(说了一大堆如果还没看懂就去问题底下的Discuss看吧….) 题解 一开始热衷于讨论第一行和最后一行的关系…结果什么也没看出来…后来看了别人的题解,才发现自…

Magic Ball Game Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 2489    Accepted Submission(s): 759 Problem Description When the magic ball game turns up, Kimi immediately falls in it. The int…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2274 Magic WisKey Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 568    Accepted Submission(s): 323 Problem Description On New Year Festival, Liu…

Dragon Balls Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3363    Accepted Submission(s): 1304 Problem Description Five hundred years later, the number of dragon balls will increase unexpecte…

http://acm.hdu.edu.cn/showproblem.php?pid=4605 可以离线求解 把所以可能出现的 magic ball  放在一个数组里(去重),从小到大排列 先不考虑特殊情况,对二叉树进行dfs 搜索的过程中需要维护各个magic ball到当前节点的概率 维护:根据当前节点大小 和要去左子树还是右子树的情况,可以得到magic数组中哪个段的x和y需要同时加上多少 可以用线段树维护 特殊情况: 1,根节点一定可以到达 2,到达不了的情况需要标记 代码: #inclu…

Magic Ball Game Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 640    Accepted Submission(s): 169 Problem Description When the magic ball game turns up, Kimi immediately falls in it. The inter…

Problem Description Five hundred years later, the number of dragon balls will increase unexpectedly, so it's too difficult for Monkey King(WuKong) to gather all of the dragon balls together. His country has N cities and there are exactly N dragon bal…

主题链接: http://acm.hdu.edu.cn/showproblem.php?pid=4016 Magic Bitwise And Operation Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65768/65768 K (Java/Others) Total Submission(s): 1315    Accepted Submission(s): 504 Problem Description Given n…