トヨタ自動車プログラミングコンテスト2024#1(AtCoder Beginner Contest 337)
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Problem Statement
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You are given a tree $T$ with $N$ vertices: vertex $1$, vertex $2$, $\ldots$, vertex $N$. The $i$-th edge $(1\leq i\lt N)$ connects vertices $u_i$ and $v_i$.
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For a vertex $u$ in $T$, define $f(u)$ as follows:
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$f(u)\coloneqq$The number of pairs of vertices$v$and$w$in$T$that satisfy the following two conditions:- Vertex
$w$is contained in the path connecting vertices$u$and$v$.$v\lt w$.
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Here, vertex $w$ is contained in the path connecting vertices $u$ and $v$ also when $u=w$ or $v=w$.
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Find the values of $f(1),f(2),\ldots,f(N)$.
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Constraints
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$2\leq N\leq2\times10^5$$1\leq u_i\leq N\ (1\leq i\leq N)$$1\leq v_i\leq N\ (1\leq i\leq N)$- The given graph is a tree.
- All input values are integers.
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Input
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The input is given from Standard Input in the following format:
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N
u_1 v_1
u_2 v_2
\vdots
u_{N-1} v_{N-1}
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Output
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Print the values of $f(1),f(2),\ldots,f(N)$ in this order, separated by spaces.
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样例
Input #1
7
1 2
2 3
2 4
4 5
4 6
6 7
Output #1
0 1 3 4 8 9 15
The given tree is as follows:

For example, $f(4)=4$. Indeed, for $u=4$, four pairs $(v,w)=(1,2),(1,4),(2,4),(3,4)$ satisfy the conditions.
Input #2
15
14 9
9 1
1 6
6 12
12 2
2 15
15 4
4 11
11 13
13 3
3 8
8 10
10 7
7 5
Output #2
36 29 32 29 48 37 45 37 44 42 33 36 35 57 35
The given tree is as follows:

The value of $f(14)$ is $57$, which is the inversion number of the sequence $(14,9,1,6,12,2,15,4,11,13,3,8,10,7,5)$.
Input #3
24
7 18
4 2
5 8
5 15
6 5
13 8
4 6
7 11
23 16
6 18
24 16
14 21
20 15
16 18
3 16
11 10
9 11
15 14
12 19
5 1
9 17
5 22
11 19
Output #3
20 20 41 20 21 20 28 28 43 44 36 63 40 46 34 40 59 28 53 53 66 42 62 63
题目信息
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。