#include <bits/stdc++.h>
using namespace std;

#define int long long
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

int dp[310][90010];

#define MOD 1000000007 

signed main(){
	int n, d, k;
	cin >> n >> d >> k;
	
	dp[0][0] = 1; 
	for(int i = 1;i <= n;i++){
		int rui[100010] = {};
		for(int j = 0;j <= k;j++){
			rui[j+1] = (rui[j] + dp[i-1][j]) % MOD;
		}

		dp[i][0] = 0;
		for(int j = 1;j <= k;j++){
			dp[i][j] = (MOD + rui[j] - rui[max(0ll, j-d)]) % MOD;
		}
	}

	cout << dp[n][k] << endl;

	return 0;
}