传送门ZOJ 3872 Beauty of Array Time Limit: 2 Seconds      Memory Limit: 65536 KB Edward has an array A with N integers. He defines the beauty of an array as the summation of all distinct integers in the array. Now Edward wants to know the summation of t…

]Edward has an array A with N integers. He defines the beauty of an array as the summation of all distinct integers in the array. Now Edward wants to know the summation of the beauty of all contiguous subarray of the array A. Input There are multiple…

Description Edward has an array A with N integers. He defines the beauty of an array as the summation of all distinct integers in the array. Now Edward wants to know the summation of the beauty of all contiguous subarray of the array A. Input There a…

题意:方格n*m,然后对于每一个格子有3种画法1左对角线2右对角线3不画,求让图形稳定的画法有多少种? 思路:通过手画二分图可以发现当二分图联通时改图满足条件,然后我们对于一个dp[n][m]可以利用容器原理先得到所有情况,然后减去不满足情况,那么以一点为中心,假设该点所在的连通块为dp[i][j]那么这时候我们把这些点先用组合数学求出所在连通块对应的组合方式有多少种,然后再是剩下的其余个点随便连都无所谓只要不连接进我原所在连通块就好了.那么我们可以推出式子 #include<bits/stdc…

题目传送门 /* DP:dp 表示当前输入的x前的包含x的子序列的和, 求和方法是找到之前出现x的位置(a[x])的区间内的子序列: sum 表示当前输入x前的所有和: a[x] 表示id: 详细解释:http://blog.csdn.net/u013050857/article/details/45285515 */ #include <cstdio> #include <algorithm> #include <cmath> #include <iostrea…

E. Mahmoud and Ehab and the xor-MST dp/数学/找规律 题意 给出一个完全图的阶数n(1e18),点由0---n-1编号,边的权则为编号间的异或,问最小生成树是多少 思路 由于一个数k和比他小的数异或,一定可以取到k与所有正整数形成的异或值的最小值.这里简单得形式化证明一下 假设一个数为1000110 那么他的最佳异或和为010(即留下最靠近右边的1其他全部置0) 我们定义\(lsb(x)=x\And(-x)\)由字符形的变量编码我们可以知道,这就可以取得x最…

http://acm.zju.edu.cn/onlinejudge/showContestProblem.do?problemId=5496 The 12th Zhejiang Provincial Collegiate Programming Contest - D Beauty of Array Time Limit: 2 Seconds      Memory Limit: 65536 KB Edward has an array A with N integers. He defines…

Beauty of Array Edward has an array A with N integers. He defines the beauty of an array as the summation of all distinct integers in the array. Now Edward wants to know the summation of the beauty of all contiguous subarray of the array A. Input The…

Beauty of Array Time Limit: 2 Seconds Memory Limit: 65536 KB Edward has an array A with N integers. He defines the beauty of an array as the summation of all distinct integers in the array. Now Edward wants to know the summation of the beauty of all…

/** Author: Oliver ProblemId: ZOJ 3872 Beauty of Array */ /* 需求: 求beauty sum,所谓的beauty要求如下: 1·给你一个集合,然后把所有子集合的美丽和求出来: 2·上例子,2.3.3.->2. 3. 3. 2.3. 3. 2.3. 思路: 1·既然要连续的,暴力也会爆,那么自然而然的优化,朝着递推想一下: 2·哥们把之前的算好了,那我们是不是可以用算好的值来求现在的的需要呢: 3·想好了,但是过程我不造该怎么说; 步骤:…