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[POJ 2135]Farm Tour(最小费用最大流)
蒟蒻zyk又来发水题题解了。。。 题目链接:http://poj.org/problem?id=2135 题意:无向边的最小费用最大流,注意要另建超级源点和超级汇点,加一条无向边相当于加4条有向边。 #include #include #include #include #include #include #define MAXV 10100 #define MAXE 1000...
分类:其他好文   时间:2014-11-14 17:56:52    阅读次数:186
树形DP [POJ 1947] Rebuilding Roads
Rebuilding RoadsTime Limit:1000MSMemory Limit:30000KTotal Submissions:9249Accepted:4198DescriptionThe cows have reconstructed Farmer John's farm, with...
分类:其他好文   时间:2014-11-13 20:21:30    阅读次数:187
uva 12186
A couple of years ago, a new world wide crisis started, leaving many people with economical problems. Some workers of a particular company are trying to ask for an increase in their salaries. The c...
分类:其他好文   时间:2014-11-11 22:56:24    阅读次数:285
hdu 3696 10 福州 现场 G - Farm Game
Description“Farm Game” is one of the most popular games in online community. In the community each player has a virtual farm. The farmer can decide to...
分类:其他好文   时间:2014-11-10 21:09:14    阅读次数:224
poj 2135 Farm Tour 【无向图最小费用最大流】
题目:poj 2135 Farm Tour  题意:给出一个无向图,问从 1 点到 n 点然后又回到一点总共的最短路。 分析:这个题目不读仔细的话可能会当做最短路来做,最短路求出来的不一定是最优的,他是两条分别最短,但不一定是和最短。 我们可以用费用流来很轻易的解决,建边容量为1,费用为边权,然后源点s连 1 ,费用0 ,容量 2 ,n点连接汇点,容量2,费用0,,就可以了。...
分类:其他好文   时间:2014-11-10 10:02:42    阅读次数:257
POJ 2135 Farm Tour(费用流)
POJ 2135 Farm Tour 题目链接 题意:给定一个无向图,边有权值,求从1到n再从n到1的最短路 思路:费用流,连边容量为1(注意是无向图),然后源点和1连容量2,n和汇点连容量是2 代码: #include #include #include #include #include using namespace std; const int M...
分类:其他好文   时间:2014-11-06 00:51:30    阅读次数:296
POJ 2135(Farm Tour-费用流)[Template:费用流 V2]
Language: Default Farm Tour Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 11916   Accepted: 4454 Description When FJ's friends visit him on the farm, h...
分类:其他好文   时间:2014-11-05 19:46:12    阅读次数:122
poj 3619 Speed Reading
Speed Reading Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 8431   Accepted: 3935 Description All K (1 ≤ K ≤ 1,000) of the cows are participating in Farm...
分类:其他好文   时间:2014-11-05 14:54:21    阅读次数:171
hdu3696 Farm Game 拓扑dp
http://acm.hdu.edu.cn/showproblem.php?pid=3696 Farm Game Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 62768/32768 K (Java/Others) Total Submission(s): 598    Accepted Submission(s): ...
分类:其他好文   时间:2014-11-05 00:31:13    阅读次数:119
POJ3255 Roadblocks 【次短路】
Roadblocks Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 7760   Accepted: 2848 Description Bessie has moved to a small farm and sometimes enjoys returnin...
分类:数据库   时间:2014-11-04 00:13:56    阅读次数:271
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