Mancunian And Colored Tree

3.9

82 votes
Easy, Trees
Problem

After a hectic week at work, Mancunian and Liverbird decide to go on a fun weekend camping trip. As they were passing through a forest, they stumbled upon a unique tree of N nodes. Vertices are numbered from 1 to N.

Each node of the tree is assigned a color (out of C possible colors). Being bored, they decide to work together (for a change) and test their reasoning skills. The tree is rooted at vertex 1. For each node, they want to find its closest ancestor having the same color.

Input format

The first line contains two integers N and C denoting the number of vertices in the tree and the number of possible colors.
The second line contains N1 integers. The i th integer denotes the parent of the i+1 th vertex.
The third line contains N integers, denoting the colors of the vertices. Each color lies between 1 and C inclusive.

Output format

Print N space-separated integers. The ith integer is the vertex number of lowest ancestor of the ith node which has the same color. If there is no such ancestor, print 1 for that node.

Constraints

  • 1N100,000
  • 1C100,000
Time Limit: 2
Memory Limit: 256
Source Limit:
Explanation

Vertices 1, 2 and 3 do not have any ancestors having the same color as them. The nearest required ancestors for vertices 4 and 5 are vertices 1 and 3 respectively.

Editor Image

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