#include <iostream>
#include <cstdio>
#include <cmath>
#include <ctime>
#include <cstdlib>
#include <cassert>
#include <vector>
#include <list>
#include <stack>
#include <queue>
#include <deque>
#include <map>
#include <set>
#include <bitset>
#include <string>
#include <algorithm>
#define llint long long
#define inf 1e18
#define mod 1000000007
#define rep(x, s, t) for(llint (x) = (s); (x) < (t); (x)++)
#define Rep(x, s, t) for(llint (x) = (s); (x) <= (t); (x)++)

using namespace std;

llint n, d, k;
llint dp[305][90005];
llint sum[90005];

int main(void)
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n >> d >> k;
	
	for(int i = 1; i <= d; i++) dp[1][i] = 1;
	for(int i = 2; i <= n; i++){
		for(int j = 1; j <= k; j++){
			sum[j] = sum[j-1] + dp[i-1][j], sum[j] %= mod;
		}
		for(int j = 1; j <= k; j++){
			dp[i][j] = sum[j-1] - sum[max(0LL, j-d-1)] + mod;
			dp[i][j] %= mod;
		}
	}
	
	return 0;
}