P25917 [AtCoder] Balanced Tree
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题目描述

Problem Statement

You are given a tree T with N vertices. The i-th edge connects vertices A_i and B_i.
Construct an N-vertex rooted tree R that satisfies the following conditions.

  • For all integer pairs (x,y) such that $1 \leq x < y \leq N$,
  • if the lowest common ancestor in R of vertices x and y is vertex z, then vertex z in T is on the simple path between vertices x and y.

  • In R, for all vertices v except for the root, the number of vertices of the subtree rooted at v, multiplied by 2, does not exceed the number of vertices of the subtree rooted at the parent of v.

We can prove that such a rooted tree always exists.

Input

The input is given from Standard Input in the following format:
N
A_1 B_1
$\vdots$
A_{N-1} B_{N-1}

Output

Let R be a rooted tree that satisfies the conditions in the Problem Statement. Suppose that the parent of vertex i in R is vertex p_i. (If i is the root, let p_i=-1.)
Print $N integers p_1,\ldots,p_N$, with spaces in between.

Constraints

  • $1 \leq N \leq 10^5$
  • $1\leq A_i,B_i \leq N$
  • All values in the input are integers.
  • The given graph is a tree.

Sample Input 1

4
1 2
2 3
3 4

Sample Output 1

2 -1 4 2

For example, the lowest common ancestor in R of vertices 1 and 3 is vertex 2; in T, vertex 2 is on the simple path between vertices 1 and 3.
Also, for example, in R, the subtree rooted at vertex 4 has two vertices, and the number multiplied by two does not exceed the number of vertices of the subtree rooted at vertex 2, which has 4 vertices.

Sample Input 2

5
1 2
1 3
1 4
1 5

Sample Output 2

-1 1 1 1 1

输入格式

见题面 Input 部分

输出格式

见题面 Output 部分

样例输入
4 1 2 2 3 3 4
样例输出
2 -1 4 2