RXD has a rooted tree T with size n, the root ID is 1, with the depth of 1
RXD has a permutation P with size n.
RXD wants to divide the permutaion into k continuous parts
For each part, he would calculate the depth of the least common ancestor of the part. And finally accumulate them.
He wants to make the final result minimized.
Please calculate the minimal answer.
1≤k≤n≤3×105,n×k≤3×105
1818: RXD, tree and sequence
时间限制: 6 Sec 内存限制: 128 MB提交: 1 解决: 1
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题目描述
输入描述
There are several test cases, please keep reading until EOF.
For each test case, the first line consists of 2 integer n,k, which means the number of the tree nodes and the size of the permutaion, and k means the number of parts.
The next line consists of n different integers, which means the permutation P.
The next n−1 lines consists of 2 integers, a,b, means a tree edge.
It is guaranteed that the edges would form a tree.
There are 6 test cases.
For each test case, the first line consists of 2 integer n,k, which means the number of the tree nodes and the size of the permutaion, and k means the number of parts.
The next line consists of n different integers, which means the permutation P.
The next n−1 lines consists of 2 integers, a,b, means a tree edge.
It is guaranteed that the edges would form a tree.
There are 6 test cases.
输出描述
For each test case, output an integer, which means the answer.
样例输入
6 3
4 6 2 5 1 3
1 2
2 3
3 4
4 5
4 6样例输出
6来源
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