题意读懂了就好做了，就是求一下点双连通分量。维护一下一颗子树的结点数，对于一个结点当u是割点的时候，统计一下u分割的连通分量v，每得到一个连通分量的结点数cnt(v)和之前连通分量结点数sum相乘一下就好。最后加一下和u的子树上的连通分量总数和其它的结点的乘积。B，C中其中一者可以是A，所有最后还要...
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其他好文 时间：
2015-08-30 15:47:00
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104
1030. Travel Plan (30)时间限制400 ms内存限制65536 kB代码长度限制16000 B判题程序Standard作者CHEN, YueA traveler's map gives the distances between cities along the highways...
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其他好文 时间：
2015-08-28 22:56:46
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146
原题如下：
A traveler's map gives the distances between cities along the highways, together with the cost of each highway. Now you are supposed to write a program to help a traveler to decide the sh...
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其他好文 时间：
2015-08-25 19:34:41
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194
1030. Travel Plan (30)A traveler's map gives the distances between cities along the highways, together with the cost of each highway. Now you are supp...
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其他好文 时间：
2015-08-20 22:25:17
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220
TopologyObjectives:Plan, design, and implement the internation Travel Agency core network.Plan, design, nad implement the Travel Data Providers netwro...
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其他好文 时间：
2015-08-20 10:27:15
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231
The HimalayasTime Limit:2 Seconds Memory Limit:65536 KBAs an artist, Bob usually need to travel around the world. He made a lot of sketch of scenery o...
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其他好文 时间：
2015-08-19 19:42:03
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167
Description
Once upon a time, there was a traveler.
He plans to travel using stagecoaches (horse wagons). His starting point and destination are fixed, but he cannot determine his route. Your...
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其他好文 时间：
2015-08-19 16:46:40
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175
TopologyObjectivesConfigure iBGP routers to use a route reflector and simple router filter.BackgroundThe International Travel Agency maintains a full-...
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其他好文 时间：
2015-08-18 11:39:44
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246
http://acm.hdu.edu.cn/showproblem.php?pid=5380
Problem Description
There are n+1 cities on a line. They are labeled from city 0 to city n. Mph has to start his travel from city 0, passing city...
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其他好文 时间：
2015-08-18 10:16:33
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153
hdu 2433 TravelDescription
One day, Tom traveled to a country named BGM. BGM is a small country, but there are N (N <= 100) towns in it. Each town products one kind of food, the food will be tra...
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其他好文 时间：
2015-08-17 21:48:16
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173
