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No.1689 Set Cards

レベル : / AI推定難易度 : 1475 / 実行時間制限 : 1ケース 2.000秒 / メモリ制限 : 512 MB / 標準ジャッジ問題
タグ : (AC するまで非表示) / 解いたユーザー数 160
作問者 : ansain / テスター : ygussany 👑 Nachia
お気に入りにしたユーザー ProblemId : 6495 / 自分の提出
問題文最終更新日: 2021-09-12 19:19:00
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yukicoder contest 315 (順位表) の他の問題:

Problem Statement

You are given $N$ sets $A_1,$ $A_2,$ $\dots,$ $A_N$.
The set $A_i$ $(1 \le i \le N)$ has $k_i$ elements, and the set $A_i$ is $\{C_{i,1},$ $C_{i,2},$ $\dots,$ $C_{i,k_i}\}$.
Among the $2^N-1$ ways to choose $1$ or more of the $N$ sets, how many ways are there such that the intersection (common part) of all the chosen sets is the empty set?
Since the answer can be very large, output it modulo $998244353$.

Input

$N$
$k_1$ $C_{1,1}$ $\dots$ $C_{1,k_1}$
$k_2$ $C_{2,1}$ $\dots$ $C_{2,k_2}$
$\vdots$
$k_N$ $C_{N,1}$ $\dots$ $C_{N,k_N}$

  • $1 \le N \le 500$
  • $0 \le k_i \le 12$
  • $1 \le C_{ij} \le 12$
  • $C_{i,1},$ $C_{i,2},$ $\dots,$ $C_{i,k_i}$ are pairwise distinct
  • All inputs are integers

Output

Output, modulo $998244353$, the number of ways among the $2^N-1$ ways to choose such that the intersection of all the chosen sets is the empty set. Print a newline at the end.

Sample

Sample 1
Input
3
2 1 2
2 1 3 
2 2 3
Output
1

We have $A_1=\{1,2\}$,
$A_2=\{1,3\}$,
$A_3=\{2,3\}$.
Among the $7$ ways to choose, the intersection is the empty set only for the way that chooses all $3$ sets.

Sample 2
Input
4
0
0
0
0
Output
15

A given set may be the empty set.

Sample 3
Input
32
5 1 2 3 4 5
4 1 2 3 4
4 1 2 3 5
4 1 2 4 5 
4 1 3 4 5
4 2 3 4 5
3 1 2 3
3 1 2 4
3 1 2 5
3 1 3 4
3 1 3 5
3 1 4 5
3 2 3 4
3 2 3 5
3 2 4 5
3 3 4 5
2 1 2 
2 1 3
2 1 4
2 1 5
2 2 3
2 2 4
2 2 5
2 3 4
2 3 5
2 4 5
1 1 
1 2
1 3
1 4
1 5
0
Output
301664622

Output the answer modulo $998244353$.

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