CF1735D.Meta-set
普及+/提高
通过率:0%
时间限制:4.00s
内存限制:256MB
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题目描述
You like the card board game "Set". Each card contains k features, each of which is equal to a value from the set 0,1,2. The deck contains all possible variants of cards, that is, there are 3k different cards in total.
A feature for three cards is called good if it is the same for these cards or pairwise distinct. Three cards are called a set if all k features are good for them.
For example, the cards (0,0,0), (0,2,1), and (0,1,2) form a set, but the cards (0,2,2), (2,1,2), and (1,2,0) do not, as, for example, the last feature is not good.
A group of five cards is called a meta-set, if there is strictly more than one set among them. How many meta-sets there are among given n distinct cards?
你喜欢纸牌游戏“Set”。每张卡片包含 k 个特征,每个特征的取值均属于集合 {0,1,2}。整副牌包含所有可能的卡片组合,即共有 3k 张互不相同的卡片。
对于三张卡片,若某一个特征在这三张卡片上全部相同,或两两互不相同,则称该特征对这三张卡片是“好的”。若三张卡片的所有 k 个特征均为“好的”,则称这三张卡片构成一个“set”(集合)。
例如,卡片 (0,0,0)、(0,2,1) 和 (0,1,2) 构成一个 set;但卡片 (0,2,2)、(2,1,2) 和 (1,2,0) 不构成 set,因为例如第三个特征(即最后一位)不是“好的”。
若一组五张卡片中严格包含多于一个 set,则称该组为一个“meta-set”(元集合)。给定 n 张互不相同的卡片,其中共有多少个 meta-set?
输入格式
The first line of the input contains two integers n and k (1≤n≤103, 1≤k≤20) — the number of cards on a table and the number of card features. The description of the cards follows in the next n lines.
Each line describing a card contains k integers ci,1,ci,2,…,ci,k (0≤ci,j≤2) — card features. It is guaranteed that all cards are distinct.
输入的第一行包含两个整数 n 和 k(1≤n≤103,1≤k≤20)—— 分别表示桌面上的卡片数量和每张卡片的特征数量。接下来的 n 行描述这些卡片。
每行描述一张卡片,包含 k 个整数 ci,1,ci,2,…,ci,k(0≤ci,j≤2)—— 表示该卡片的各个特征。保证所有卡片互不相同。
输出格式
Output one integer — the number of meta-sets.
输出一个整数——元集的数量。
输入输出样例
输入#1
8 4 0 0 0 0 0 0 0 1 0 0 0 2 0 0 1 0 0 0 2 0 0 1 0 0 1 0 0 0 2 2 0 0
输出#1
1
输入#2
7 4 0 0 0 0 0 0 0 1 0 0 0 2 0 0 1 0 0 0 2 0 0 1 0 0 0 2 0 0
输出#2
3
输入#3
9 2 0 0 0 1 0 2 1 0 1 1 1 2 2 0 2 1 2 2
输出#3
54
输入#4
20 4 0 2 0 0 0 2 2 2 0 2 2 1 0 2 0 1 1 2 2 0 1 2 1 0 1 2 2 1 1 2 0 1 1 1 2 2 1 1 0 2 1 1 2 1 1 1 1 1 2 1 2 0 2 1 1 2 2 1 2 1 2 1 1 1 0 1 1 2 0 0 1 0 2 2 0 0 2 0 0 2
输出#4
0
说明/提示
Let's draw the cards indicating the first four features. The first feature will indicate the number of objects on a card: 1, 2, 3. The second one is the color: red, green, purple. The third is the shape: oval, diamond, squiggle. The fourth is filling: open, striped, solid.
You can see the first three tests below. For the first two tests, the meta-sets are highlighted.
In the first test, the only meta-set is the five cards (0000, 0001, 0002, 0010, 0020). The sets in it are the triples (0000, 0001, 0002) and (0000, 0010, 0020). Also, a set is the triple (0100, 1000, 2200) which does not belong to any meta-set.

In the second test, the following groups of five cards are meta-sets: (0000, 0001, 0002, 0010, 0020), (0000, 0001, 0002, 0100, 0200), (0000, 0010, 0020, 0100, 0200).

In there third test, there are 54 meta-sets.

我们来绘制表示前四个特征的卡片。第一个特征表示卡片上物体的数量:1、2、3;第二个特征表示颜色:红色、绿色、紫色;第三个特征表示形状:椭圆形、菱形、S形(squiggle);第四个特征表示填充方式:空心、条纹、实心。
下方展示了前三组测试样例。对于前两个测试,其中的“元组集”(meta-sets)已被高亮标出。
在第一个测试中,唯一的元组集是五张卡片 (0000, 0001, 0002, 0010, 0020)。该元组集中包含的集合(sets)为三元组 (0000, 0001, 0002) 和 (0000, 0010, 0020)。此外,三元组 (0100, 1000, 2200) 也是一个集合,但它不属于任何元组集。

在第二个测试中,以下五张卡片组成的组均为元组集:(0000, 0001, 0002, 0010, 0020)、(0000, 0001, 0002, 0100, 0200)、(0000, 0010, 0020, 0100, 0200)。

在第三个测试中,共有 54 个元组集。

输入解题思路,AI测评打分。不知道怎么写?