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 (GCC 9.2.1) (judge verdict: Accepted)

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int gcd(int a,int b);
int compare(const void* a, const void* b);

int main(void){
    int N,K;
    int i,j,d,A,ret,flag;
    int arrN[100];
    //初期化    
    for(i=0;i<100;i++){
        arrN[i] = 0;
    }
    
    scanf("%d %d",&N,&K);

    for(i = 0 ; i < K ; i++){
        // i番目のお菓子を持っているのはd人でN[J]君が持っている
        scanf("%d",&d);
        for(j = 0; j < d; j++){
            scanf("%d",&A);
            A--;
            arrN[A]++;
        }
    }
    ret = 0;
    for(i=0;i<N;i++){
        if (arrN[i] == 0 ){
            ret++;
        }
    }
    printf("%d\n",ret);
}
int compare(const void* a, const void* b){
    return strcmp(a, b);
}
// 最大公約数
int gcd(int a,int b){
    int c;
    int tmp;
    if(b > a){  //bがaより大きい場合bとaを入れ替える
        c = a;
        a = b;
        b = c;
    }
    tmp = a % b;
    while(tmp!=0){
        a = b;
        b = tmp;
        tmp = a % b;
    }
    return b;
}