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