#1803. Spoj1487 Query on a tree III

题目描述

You are given a node-labeled rooted tree with n nodes. Define the query (x, k): Find the node whose label is k-th largest in the subtree of the node x. Assume no two nodes have the same labels.

输入格式

The first line contains one integer n (1 <= n <= 10^5). The next line contains n integers li (0 <= li <= 109) which denotes the label of the i-th node. Each line of the following n - 1 lines contains two integers u, v. They denote there is an edge between node u and node v. Node 1 is the root of the tree. The next line contains one integer m (1 <= m <= 10^4) which denotes the number of the queries. Each line of the next m contains two integers x, k. (k <= the total node number in the subtree of x)

输出格式

For each query (x, k), output the index of the node whose label is the k-th largest in the subtree of the node x.

样例

样例输入

5  

1 3 5 2 7  

1 2  

2 3  

1 4  

3 5  

4  

2 3  

4 1  

3 2  

3 2  

样例输出

5  

4  

5  

5  

数据范围与提示

Amber的play with tree系列的题....