#include <fstream>
#define int long long
using namespace std;
ifstream cin("arbori.in");
ofstream cout("arbori.out");
int n,m,k,dp[100][100],sol;
/// dp[i][j] = numarul de arbori valizi cu i noduri si j frunze pe ultimul nivel
signed main()
{
    cin>>n>>k>>m;
    for(int i=k;i<=n;i+=k)
        dp[1+i][i]=1;
    for(int i=k+1;i<=n;i++){/// noduri
        for(int j=1;j<i;j++){/// frunze
            for(int t=k-1;i+t<=n;t+=k){/// cate noduri adaug la un nod
                dp[i+t][t]+=dp[i][j]*j;
            }
        }
    }
    for(int i=1;i<=n;i++)
        sol+=dp[n][i];
    cout<<sol;
    return 0;
}