AtCoder Regular Contest 117
D
Miracle Tree
AtCoder
⌀ 2115
原题
← CE →
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Problem Statement

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We have a tree with $N$ vertices, numbered $1, 2, \dots, N$. The $i$-th edge $(1 \leq i \leq N-1)$ connects Vertex $A_i$ and Vertex $B_i$.

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A boy E869120 found this tree and wants to write an integer in each vertex to surprise another boy square1001. For that, the following conditions need to be satisfied, where $E_i$ is the integer written on Vertex $i$.

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Condition 1: $E_i \geq 1$ $(1 \leq i \leq N)$ holds. Condition 2: $|E_i - E_j| \geq dist(i, j)$ holds for every pair $(i, j)$ $(1 \leq i < j \leq N)$. Condition 3: the value $\max(E_1, E_2, \dots, E_N)$ should be minimized while satisfying Conditions 1 and 2.

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Here, $dist(i, j)$ is:

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  • the length of the simple path (the path without repetition of the same vertex) from Vertex $i$ to $j$.
  • In other words, it is the value $L$ where the simple path is $q_0 \to q_1 \to q_2 \to \cdots \to q_L$ ($q_0 = i, q_L = j$).
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Construct one way to write integers that surprises square1001.

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Constraints

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  • $2 \leq N \leq 200000$
  • $1 \leq A_i < B_i \leq N$
  • The given graph is a tree.
  • All values in input are integers.
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Input

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Input is given from Standard Input in the following format:

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N
A_1 B_1
A_2 B_2
\vdots
A_{N-1} B_{N-1}

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Output

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Print a line containing integers $E_1, E_2, \cdots, E_N$ to write on the vertices, in this order, with space as separator.

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If there are multiple ways to write integers that satisfy the conditions in the Problem Statement, any of them will be accepted.

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E_1 E_2 \cdots E_{N}

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样例

Input #1
2
1 2
Output #1
2 1
If we write an integer $2$ on Vertex $1$ and an integer $1$ on Vertex $2$, we have $dist(1, 2) = 1$ and $|E_1 - E_2| = 1$, satisfying Condition 2. The other conditions are also satisfied, so we can surprise square1001 this way. $(E_1, E_2) = (1, 2)$ will also be accepted.
Input #2
4
1 2
1 4
2 3
Output #2
3 2 1 4
$(E_1, E_2, E_3, E_4) = (2, 3, 4, 1)$ will also be accepted.
题目信息
题号
arc117_d
时间限制
2 s
内存限制
1024 MB

题面与样例版权归 AtCoder 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。