2016中国大学生程序设计竞赛 - 网络选拔赛 1003 Magic boy Bi Luo with his excited tree hdu5834
Problem Description
Bi Luo is a magic boy, he also has a migic tree, the tree has
N nodes , in each node , there is a treasure, it's value is
V[i], and for each edge, there is a cost
C[i], which means every time you pass the edge
i , you need to pay
C[i].
You may attention that every V[i] can be taken only once, but for some C[i] , you may cost severial times.
Now, Bi Luo define ans[i] as the most value can Bi Luo gets if Bi Luo starts at node i.
Bi Luo is also an excited boy, now he wants to know every ans[i], can you help him?
You may attention that every V[i] can be taken only once, but for some C[i] , you may cost severial times.
Now, Bi Luo define ans[i] as the most value can Bi Luo gets if Bi Luo starts at node i.
Bi Luo is also an excited boy, now he wants to know every ans[i], can you help him?
Input
First line is a positive integer
T(T≤104) , represents there are
T test cases.
Four each test：
The first line contain an integer N (N≤105).
The next line contains N integers V[i], which means the treasure’s value of node i(1≤V[i]≤104).
For the next N−1 lines, each contains three integers u,v,c , which means node u and node v are connected by an edge, it's cost is c(1≤c≤104).
You can assume that the sum of N will not exceed 106.
Four each test：
The first line contain an integer N (N≤105).
The next line contains N integers V[i], which means the treasure’s value of node i(1≤V[i]≤104).
For the next N−1 lines, each contains three integers u,v,c , which means node u and node v are connected by an edge, it's cost is c(1≤c≤104).
You can assume that the sum of N will not exceed 106.
Output
For the i-th test case , first output Case #i: in a single line , then output
N lines , for the i-th line , output
ans[i] in a single line.
Sample Input
1 5 4 1 7 7 7 1 2 6 1 3 1 2 4 8 3 5 2
Sample Output
Case #1: 15 10 14 9 15
这题没出是我的锅。。有个地方偷个懒少维护个东西结果被卡T了
f[i][0/1]表示这个点为根的情况不返回/返回的最大收益
然后先以1为根做一遍
然后遍历这棵树。手动转换根。每次转换只影响自己和父节点两个
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