#include <iostream>
#include <vector>
#include <atcoder/all>

using namespace std;
using namespace atcoder;

using mint=modint1000000007;

int main(){
    int n,d,k;
    cin>>n>>d>>k;
    vector<mint> cur(k,0),a(d,1);
    cur[0]=1;
    for(int i=0;i<n;i++) cur=convolution(cur,a);
    cout<<cur[k-n].val()<<endl;
    return 0;
}