Score : $400$ points
We have an undirected graph $G$ with $N$ vertices numbered $1$ to $N$ and $N$ edges as follows:
For each $k=1,2,...,N-1$, solve the problem below:
Input is given from Standard Input in the following format:
$N$ $X$ $Y$
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:
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:
7 3 7
7 8 4 2 0 0
10 4 8
10 12 10 8 4 1 0 0 0