#P6451. Diameter of a Tree

    ID: 5318 远端评测题 10000ms 512MiB 尝试: 0 已通过: 0 难度: (无) 上传者: 标签>The 43rd ACM International Collegiate Programming Contest Asia Shenyang Regional Contest

Diameter of a Tree

Problem Description

Given a weighted tree $T_0$, we define its diameter as the length of the longest path between two vertices on it, where the length of a path is equal to the sum of weights of edges in the path.

If the tree stretches like a spider or a yawning tiger, its diameter will change.
Let's use $T_i$ to denote the state of the tree after $i$ seconds, at which time the weight of each edge has been increased by exactly $i$ units from $T_0$.

You will be presented with several different queries, and you should calculate the tree's diameter at some specified time for each query.

Input

The input contains several test cases, and the first line contains a positive integer $T$ indicating the number of test cases which is up to $60$.

For each test case, the first line contains two integers $n$ and $m$ indicating the number of vertices in the tree and the number of given queries respectively, where $2 \le n \le 2 \times 10^5$ and $1 \le m \le 2 \times 10^5$.

Each of the following $(n - 1)$ lines contains three integers $u, v$ and $w$ which represent an edge in the original tree between the $u$-th vertex and the $v$-th one of weight $w$, where $1 \le u, v \le n$, $u \ne v$ and $1 \le w \le 10^8$.

Each of the following $m$ lines describes a query containing only one integer $k$ that asks you to calculate the diameter of the tree $T_k$, where $0 \le k \le 10^9$.

We guarantee that the sum of $n$ in all test cases is no larger than $10^6$, and the sum of $m$ in all test cases is no larger than $10^6$ as well.

Output

For each test case, output a line containing "Case #x:" (without quotes) at first, where $x$ is the test case number starting from $1$.

Then output $m$ lines corresponding to all queries.
The $i$-th line of them contains an integer indicating the answer to the $i$-th query

2 3 3 1 2 1 1 3 5 5 10 100 5 6 1 2 100 2 3 5 2 4 1 4 5 1 0 1 2 3 4 5
Case #1: 16 26 206 Case #2: 105 107 109 111 114 117

Hint


In the second sample case:
the diameter of T0 is 105, which is the length of the path 1 - 2 - 3 and
the diameter of T5 is 117, which is the length of the path 1 - 2 - 4 - 5.