#AT2146. F - Keep Connect
F - Keep Connect
F - Keep Connect
Score : $500$ points
Problem Statement
You are given an integer $N$ greater than or equal to $2$ and a prime $P$.
Consider the graph $G$ with $2N$ vertices and $(3N-2)$ edges shown in the figure below.

More specifically, the edges connect the vertices as follows, where the vertices are labeled as Vertex $1$, Vertex $2$, $\ldots$, Vertex $2N$, and the edges are labeled as Edge $1$, Edge $2$, $\ldots$, Edge $(3N-2)$.
- For each $1\leq i\leq N-1$, Edge $i$ connects Vertex $i$ and Vertex $i+1$.
- For each $1\leq i\leq N-1$, Edge $(N-1+i)$ connects Vertex $N+i$ and Vertex $N+i+1$.
- For each $1\leq i\leq N$, Edge $(2N-2+i)$ connects Vertex $i$ and Vertex $N+i$.
For each $i=1,2,\ldots ,N-1$, solve the following problem.
Find the number of ways, modulo $P$, to remove exactly $i$ of the $3N-2$ edges of $G$ so that the resulting graph is still connected.
Constraints
- $2 \leq N \leq 3000$
- $9\times 10^8 \leq P \leq 10^9$
- $N$ is an integer.
- $P$ is a prime.
Input
Input is given from Standard Input in the following format:
Output
Print $N-1$ integers, the $i$-th of which is the answer for $i=k$, separated by spaces.
3 998244353
7 15
In the case $N=3$, there are $7$ ways, shown below, to remove exactly one edge so that the resulting graph is still connected.
There are $15$ ways, shown below, to remove exactly two edges so that the resulting graph is still connected.
Thus, these numbers modulo $P=998244353$ should be printed: $7$ and $15$, in this order.
16 999999937
46 1016 14288 143044 1079816 6349672 29622112 110569766 330377828 784245480 453609503 38603306 44981526 314279703 408855776
Be sure to print the numbers modulo $P$.
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