Problem:
Score : 200 points

Problem Statement

N Snukes called Snuke 1, Snuke 2, ..., Snuke N live in a town.

There are K kinds of snacks sold in this town, called Snack 1, Snack 2, ..., Snack K. The following d_i Snukes have Snack i: Snuke A_{i, 1}, A_{i, 2}, \cdots, A_{i, {d_i}}.

Takahashi will walk around this town and make mischief on the Snukes who have no snacks. How many Snukes will fall victim to Takahashi's mischief?

Constraints

All values in input are integers.

1 \leq N \leq 100

1 \leq K \leq 100

1 \leq d_i \leq N

1 \leq A_{i, 1} < \cdots < A_{i, d_i} \leq N

Input

Input is given from Standard Input in the following format:

N K
d_1
A_{1, 1} \cdots A_{1, d_1}
\vdots
d_K
A_{K, 1} \cdots A_{K, d_K}

Output

Print the answer.

Sample Input 1

3 2
2
1 3
1
3

Sample Output 1

1

Snuke 1 has Snack 1.

Snuke 2 has no snacks.

Snuke 3 has Snack 1 and 2.

Thus, there will be one victim: Snuke 2.

Sample Input 2

3 3
1
3
1
3
1
3

Sample Output 2

2

Solution in C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
public class Hello
{
    public static void Main()
    {
        //入力を保持する
        var NK = Console.ReadLine().Split().Select(e => int.Parse(e)).ToArray();
        //すぬけ君の数
        var N = NK[0];
        //お菓子の種類
        var K = NK[1];
        var candyFlgs = new bool[N + 1];
        //K種のお菓子分入力を受ける
        for(var n = 0;n < K; n++)
        {
            //お菓子を持っている人数分ループを実施する
            var loop = int.Parse(Console.ReadLine());
            //お菓子を持っている個人の配列を保持する
            var people = Console.ReadLine().Split().Select(e => int.Parse(e)).ToArray();
            for( var l = 0; l < loop; l++)
            {
                //お菓子を持っているすぬけ君をtrueとする
                candyFlgs[people[l]] = true;
            }
        }
        var ans =0;
        for(var indx = 1;indx < candyFlgs.Length;indx++)
        {
            if(candyFlgs[indx] == false)
            {
                ans++;
            }
        }
        Console.WriteLine(ans);
    }
}