#include<stdio.h>

FILE *f = fopen("kperm.in","r");
FILE *g = fopen("kperm.out","w");

int N,K,Sol;
int V[100],B[100];

void citire(void)
{
    fscanf(f,"%d %d",&N,&K);
}

inline int verif(void)
{
    int sum = 0;

    for(int i=1;i<=N;i++)
    {
        sum += V[i];
        if(i >= K)
        {
            sum -= V[i-K];
            if(sum%K)
                return 0;
        }
    }

    return 1;
}

inline void back(int k)
{
    if(k == N+1)
    {
        Sol += verif();

        return ;
    }

    for(int i=1;i<=N;i++)
        if(!B[i])
        {
            V[k] = i;
            B[i] = 1;
            back(k+1);
            B[i] = 0;
        }
}

int main()
{
    /*for(int i=2;i<=12;i++)
        for(int j=2;j<=i;j++)
        {
            N = i, K = j;
            Sol = 0;
            back(1);
            printf("%d %d = %d\n",N,K,Sol);
        }*/

    citire();
    back(1);

    fprintf(g,"%d\n",Sol);
}