import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;


public class Main  {
    final static int forNine = 45;
    final static int forNineNine = 900;
    final static int forNineNineNine = 13500;

    public static void main(String[] args) throws IOException {

        File a = new File("book.in");
        Scanner sc = new Scanner(a);
        FileWriter writer = new FileWriter("book.out");

        int n = sc.nextInt(), k = sc.nextInt();

        int sum = analyzeNumber(n);

        for(int i = 0; i < k; i++){
            sum -= getSum(n - sc.nextInt() + 1);
        }

        writer.append(sum + "");
        writer.flush();
        writer.close();
    }

    public static int getSum(int x){
        if(x < 10)
            return x;
        else if(x < 100)
            return  x / 10 + (x - x / 10 * 10);
        else if (x < 1000)
            return x / 100 + (x / 10 - x / 100 * 10) + (x - x / 100 * 100 - (x / 10 - x / 100 * 10) * 10);
        else {
            char[] xs = Integer.toString(x).toCharArray();
            int sum = 0;
            for(char j: xs)
                sum += Integer.parseInt(j + "");

            return sum;
        }
    }

    public static int getSumFor(int x){
        if(x == 0)
            return 0;

        int sum = 0;
        for(int i = 1; i <= x; i++)
            sum += i;

        return sum;
    }

    public static int for100(int x){
        return (x / 10) * forNine + getSumFor(x / 10 - 1) * 10 + (x / 10) * (x % 10 + 1) + getSumFor(x % 10);
    }

    public static int for1000(int x){
        return (x / 100) * forNineNine + for100(x - x / 100 * 100) + getSumFor(x / 100 - 1) * 100 + (x / 100) * (x % 100 + 1);
    }

    public static int for10000(int x){
        return (x / 1000) * forNineNineNine + for1000(x - x / 1000 * 1000) + getSumFor(x / 1000 - 1) * 1000 + (x / 1000) * (x % 1000 + 1);
    }

    public static int analyzeNumber(int x){
        if(x < 10)
            return getSumFor(x);
        if(x < 100)
            return for100(x);
        if(x < 1000)
            return for1000(x);
        else return for10000(x);
    }
}