import java.io.*;
import java.util.*;

public class Main {
    static long[] values;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        long x = sc.nextLong();
        int size = sc.nextInt();
        values = new long[size];
        for (int i = 0; i < size; i++) {
            values[i] = kaijo(size - i);
        }
        int[] perm = getPerm(x, size);
        int[] reverse = getReverse(perm);
        long ans = getOrder(reverse);
        System.out.println(ans);
    }
    
    static long getOrder(int[] reverse) {
        ArrayList<Integer> list = new ArrayList<>();
        for (int i = 1; i <= reverse.length; i++) {
            list.add(i);
        }
        long order = 0;
        for (int i = 0; i < reverse.length - 1; i++) {
            for (int j = 0; j < list.size(); j++) {
                if (reverse[i] == list.get(j)) {
                    order += values[i + 1] * j;
                    list.remove(j);
                    break;
                }
            }
        }
        return order;
    }
    
    static int[] getReverse(int[] perm) {
        int[] reverse = new int[perm.length];
        for (int i = 1; i <= perm.length; i++) {
            for (int j = 0; j < perm.length; j++) {
                if (perm[j] == i) {
                    reverse[i - 1] = j + 1;
                    break;
                }
            }
        }
        return reverse;
    }
    
    static int[] getPerm(long order, int size) {
        ArrayList<Integer> list = new ArrayList<>();
        for (int i = 1; i <= size; i++) {
            list.add(i);
        }
        int[] perm = new int[size];
        for (int i = 0; i < size - 1; i++) {
            int idx;
            if (values[i + 1] <= order) {
                idx = (int)(order / values[i + 1]);
                order %= values[i + 1];
            } else {
                idx = 0;
            }
            perm[i] = list.remove(idx);
        }
        perm[size - 1] = list.get(0);
        return perm;
    }
    
    static long kaijo(int x) {
        if (x == 0) {
            return 1;
        } else {
            return x * kaijo(x - 1);
        }
    }
}

class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public String next() throws Exception {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}