题目链接:https://www.nowcoder.com/acm/contest/145/A A.Minimum Cost Perfect Matching You have a complete bipartite graph where each part contains exactly n nodes, numbered from 0 to n - 1 inclusive.The weight of the edge connecting two vertices with numbe…

题意: 给定n, 求一个0~n-1的全排列p, 使得的和最小 分析: 打表发现最优解肯定是和为0的, 然后如果为2的幂就是直接反转即可, 不然的话就要分开从前面到后面逐步拆分, 具体思想模拟一下n = 3 , n = 11即可. #include<bits/stdc++.h> using namespace std; ; int N; int a[maxN]; void solve(int st, int n){ ) return; ; //找到一个小于等于n的b ) < n) { b…

题意:1-n-1个数和1-n-1个数两两匹配,每次匹配将两个数的值进行与运算,要求每次匹配与运算的和相加最小,问满足匹配的配对方式 分析:打表前10个数与运算最小的匹配,我们发现,从n-1开始按位取反可以得到前面的一个值,这两个值的与运算结果为0 不管奇数还是偶数,前面和后面的数都可以两两匹配,偶数刚好匹配,奇数还剩下一个0,0可以与0匹配结果还是0 AC代码: #include <map> #include <set> #include <stack> #includ…

链接:https://www.nowcoder.com/acm/contest/145/A 来源:牛客网 时间限制:C/C++ 1秒,其他语言2秒 空间限制:C/C++ 262144K,其他语言524288K Special Judge, 64bit IO Format: %lld 题目描述 You have a complete bipartite graph where each part contains exactly n nodes, numbered from 0 to n - 1…

There are N piles of stones arranged in a row.  The i-th pile has stones[i] stones. A move consists of merging exactly K consecutive piles into one pile, and the cost of this move is equal to the total number of stones in these K piles. Find the mini…

Leetcode之动态规划(DP)专题-983. 最低票价(Minimum Cost For Tickets) 在一个火车旅行很受欢迎的国度,你提前一年计划了一些火车旅行.在接下来的一年里,你要旅行的日子将以一个名为 days 的数组给出.每一项是一个从 1 到 365 的整数. 火车票有三种不同的销售方式: 一张为期一天的通行证售价为 costs[0] 美元: 一张为期七天的通行证售价为 costs[1] 美元: 一张为期三十天的通行证售价为 costs[2] 美元. 通行证允许数天无限制的旅…

Description Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N shopkeepers (marked from 1 to N) which stocks goods from him.Dearboy has M supply places (marked from 1 to M), each provides K di…

题面 Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N shopkeepers (marked from 1 to N) which stocks goods from him.Dearboy has M supply places (marked from 1 to M), each provides K different k…

There are N piles of stones arranged in a row.  The i-th pile has stones[i] stones. A move consists of merging exactly K consecutive piles into one pile, and the cost of this move is equal to the total number of stones in these K piles. Find the mini…

POJ 2516 Minimum Cost (网络流,最小费用流) Description Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N shopkeepers (marked from 1 to N) which stocks goods from him.Dearboy has M supply places (marke…