#include <bits/stdc++.h>
using namespace std;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif
#define GET_MACRO(_1, _2, _3, NAME, ...) NAME
#define _rep(i, n) _rep2(i, 0, n)
#define _rep2(i, a, b) for(int i = (int)(a); i < (int)(b); i++)
#define rep(...) GET_MACRO(__VA_ARGS__, _rep2, _rep)(__VA_ARGS__)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
using i64 = long long;
template<class T>
bool chmin(T& a, const T& b) { return (b < a) ? (a = b, true) : false; }
template<class T>
bool chmax(T& a, const T& b) { return (b > a) ? (a = b, true) : false; }

template<typename T>istream& operator>>(istream&i,vector<T>&v){rep(j,v.size())i>>v[j];return i;}
template<typename T>string join(vector<T>&v){stringstream s;rep(i,v.size())s<<' '<<v[i];return s.str().substr(1);}
template<typename T>ostream& operator<<(ostream&o,vector<T>&v){if(v.size())o<<join(v);return o;}
template<typename T>string join(vector<vector<T>>&vv){string s="\n";rep(i,vv.size())s+=join(vv[i])+"\n";return s;}
template<typename T>ostream& operator<<(ostream&o,vector<vector<T>>&vv){if(vv.size())o<<join(vv);return o;}

using mint = modint998244353;
const i64 mod = 998244353;

vector<mint> fact(int x)
{
    vector<mint> res(x + 1);
    res[0] = 1;
    rep(i, x)
    {
        res[i + 1] = res[i] * (i + 1);
    }
    return res;
}

vector<mint> finv(int x)
{
    vector<mint> res(x + 1);
    mint t = 1;
    for(int i = 1; i <= x; i++)
    {
        t *= i;
    }
    res[x] = 1 / t;
    for(int i = x; i > 0; i--)
    {
        res[i - 1] = res[i] * i;
    }
    return res;
}

auto r = fact(10000005);
auto l = finv(10000005);

mint comb(i64 x, i64 y)
{
    if(x < y ) return 0;
    return r[x] * l[y] * l[x - y];
}

int main()
{
    i64 k, m, n;
    cin >> n >> m >> k;
    mint ans = 0;
    rep(i, 1, n - m + 2)
    {
        ans += comb(n - i * k, n - m) * comb(n - m + 1, i) * pow_mod(-1, i + 1, mod);
    }
    cout << ans.val() << endl;
}