题意:给你n个点m无向条边.每个点是黑色或者白色的.m条边第一条边边权为2^m,第二条边边权为2^(m-1)....... .在这个图上选择一些边连起来,使得满足:每个黑点连奇数条边,每个白点连偶数条边的条件.并且选择的边权和最小. 这是CometOJ DIV2直播上讲的一道题,大佬说的解法如下: 首先如果一个连通块的黑点个数如果是偶数,那么把黑点当做叶子节点做一下生成树,一定是满足要求的,所以如果连通块黑点个数是偶数,必然存在一个子图满足要求.而如果黑点个数是奇数,因为点的度数总和是偶数,所以…

#define null ""是用来将字符串清空的 #define none -1是用来当不存在这种动物时,返回-1. 其实这种做法有点多余,不过好理解一些. Home Web Board ProblemSet Standing Status Statistics   Problem J: 动物爱好者 Problem J: 动物爱好者 Time Limit: 1 Sec  Memory Limit: 128 MBSubmit: 509  Solved: 376[Submit][Stat…

Problem J. Triatrip Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100342/attachments Description The travel agency “Four Russians” is offering the new service for their clients. Unlike other agencies that only suggest one-way…

Problem J Joking with Fermat's Last Theorem Fermat's Last Theorem: no three positive integers a, b, and c can satisfy the equation an + bn = cn for any integer value of n greater than two. From the theorem, we know that a3 + b3 = c3 has no positive i…

Problem J. TriatripTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100342/attachments Description The travel agency “Four Russians” is offering the new service for their clients. Unlike other agencies that only suggest one-way…

Problem J: 求个最大值 Time Limit: 1 Sec  Memory Limit: 128 MBSubmit: 871  Solved: 663[Submit][Status][Web Board] Description 定义MaxValue类,用于求一系列非零整数的最大值.其中: 1. 数据成员elements用于存储所有输入的非零整数. 2. void append(int)用于向elements中添加一个新数据. 3. int getMax()用于求出elements中的…

Problem J. Journey with Pigshttp://codeforces.com/gym/241680/problem/J考察排序不等式算出来单位重量在每个村庄的收益,然后生序排列猪的重量也生序排列此时价值最大 #include<iostream> #include<cstdio> #include<queue> #include<algorithm> #include<cmath> #include<ctime>…

Problem J. Joke 题目连接: http://codeforces.com/gym/100714 Description The problem is to cut the largest possible number of circles with diameter y out of a stripe of length x and width y. Input The only line of input consists of two positive real number…

题目:Problem J. TerminalInput file: standard inputOutput file: standard inputTime limit: 2 secondsMemory limit: 256 mebibytesN programmers from M teams are waiting at the terminal of airport. There are two shuttles at the exitof terminal, each shuttle…

任意门:http://acm.hdu.edu.cn/showproblem.php?pid=6341 Problem J. Let Sudoku Rotate Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 1363    Accepted Submission(s): 717 Problem Description Sudoku i…