和上一道题一样,可以用DAG上的动态规划来做,也可以建立一个源点,用spfa来做 #include<cstdio> #include<cstring> #include<iostream> #include<algorithm> #include<stack> #include<vector> using namespace std; ; int n,m; int first[maxn]; int sc[maxn],scn[maxn]…

// 题目描述:从武汉大学ACM集训队退役后,flymouse 做起了志愿者,帮助集训队做一些琐碎的事情,比如打扫集训用的机房等等.当圣诞节来临时,flymouse打扮成圣诞老人给集训队员发放礼物.集训队员住在校园通过宿舍的不同寝室里.为了节省体力,flymouse决定从某个寝室出发,沿着一些有向路一个接一个地访问寝室并顺便发放礼物,直到所有集训队员的起始走遍为止.以前flymouse在集训队的日子里,他给其他队员留下了不同的印象.他们中的一些人,比如LiZhiXu,对flymouse的印象特别…

Father Christmas flymouse Time Limit: 1000MS   Memory Limit: 131072K Total Submissions: 3007   Accepted: 1021 Description After retirement as contestant from WHU ACM Team, flymouse volunteered to do the odds and ends such as cleaning out the computer…

Father Christmas flymouse Time Limit: 1000MS   Memory Limit: 131072K Total Submissions: 3241   Accepted: 1099 Description After retirement as contestant from WHU ACM Team, flymouse volunteered to do the odds and ends such as cleaning out the computer…

Time Limit: 1000MS   Memory Limit: 131072K Total Submissions: 3496   Accepted: 1191 缩点,然后每个新点跑一边SPFA 思路不难 ,注意细节~ #include <algorithm> #include <cstring> #include <cstdio> #include <queue> using namespace std; +); +); int n,m,u,v,va…

Father Christmas flymouse Time Limit: 1000MS   Memory Limit: 131072K Total Submissions: 3479   Accepted: 1185 Description After retirement as contestant from WHU ACM Team, flymouse volunteered to do the odds and ends such as cleaning out the computer…

Father Christmas flymouse Time Limit: 1000MS Memory Limit: 131072K Description After retirement as contestant from WHU ACM Team, flymouse volunteered to do the odds and ends such as cleaning out the computer lab for training as extension of his contr…

来源poj3160 After retirement as contestant from WHU ACM Team, flymouse volunteered to do the odds and ends such as cleaning out the computer lab for training as extension of his contribution to the team. When Christmas came, flymouse played Father Chri…

Father Christmas flymouse Time Limit: 1000MS Memory Limit: 131072K Description After retirement as contestant from WHU ACM Team, flymouse volunteered to do the odds and ends such as cleaning out the computer lab for training as extension of his contr…

POJ 3013 Big Christmas Tree(最短路Dijkstra+优先队列优化,SPFA) ACM 题目地址:POJ 3013 题意:  圣诞树是由n个节点和e个边构成的,点编号1-n.树根为编号1,选择一些边.使得全部节点构成一棵树.选择边的代价是(子孙的点的重量)×(这条边的价值). 求代价最小多少. 分析:  单看每一个点被计算过的代价,非常明显就是从根到节点的边的价值.所以这是个简单的单源最短路问题. 只是坑点还是非常多的. 点的数量高达5w个,用矩阵存不行.仅仅能用边存.…