传统题 1000ms 256MiB

D - Line++

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D - Line++

Score : $400$ points

Problem Statement

We have an undirected graph $G$ with $N$ vertices numbered $1$ to $N$ and $N$ edges as follows:

  • For each $i=1,2,...,N-1$, there is an edge between Vertex $i$ and Vertex $i+1$.
  • There is an edge between Vertex $X$ and Vertex $Y$.

For each $k=1,2,...,N-1$, solve the problem below:

  • Find the number of pairs of integers $(i,j) (1 \leq i < j \leq N)$ such that the shortest distance between Vertex $i$ and Vertex $j$ in $G$ is $k$.

Constraints

  • $3 \leq N \leq 2 \times 10^3$
  • $1 \leq X,Y \leq N$
  • $X+1 < Y$
  • All values in input are integers.

Input

Input is given from Standard Input in the following format:

NN XX YY

Output

For each $k=1, 2, ..., N-1$ in this order, print a line containing the answer to the problem.


5 2 4
5
4
1
0

The graph in this input is as follows:

Figure

There are five pairs $(i,j) (1 \leq i < j \leq N)$ such that the shortest distance between Vertex $i$ and Vertex $j$ is $1$: $(1,2)\,,(2,3)\,,(2,4)\,,(3,4)\,,(4,5)$.
There are four pairs $(i,j) (1 \leq i < j \leq N)$ such that the shortest distance between Vertex $i$ and Vertex $j$ is $2$: $(1,3)\,,(1,4)\,,(2,5)\,,(3,5)$.
There is one pair $(i,j) (1 \leq i < j \leq N)$ such that the shortest distance between Vertex $i$ and Vertex $j$ is $3$: $(1,5)$.
There are no pairs $(i,j) (1 \leq i < j \leq N)$ such that the shortest distance between Vertex $i$ and Vertex $j$ is $4$.


3 1 3
3
0

The graph in this input is as follows:

Figure


7 3 7
7
8
4
2
0
0

10 4 8
10
12
10
8
4
1
0
0
0

2024春季入门组刷题营(三)

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IOI
题目
8
开始于
2024-3-24 13:00
结束于
2024-3-24 15:00
持续时间
2 小时
主持人
参赛人数
10