#include <bits/stdc++.h>
using namespace std;
const long long mod = 998244353;
long long p, r, s, ans, fact[6010];
long long winHasMoreThanr, oneHasMoreThanr;
long long pw(long long a, long long b) {
  long long res = 1;
  while (b) {
    if (b & 1) {
      res *= a;
      res %= mod;
    }
    a *= a;
    a %= mod;
    b >>= 1;
  }
  return res;
}
void precalc() {
  fact[0] = fact[1] = 1;
  for (long long i = 2; i <= 6000; ++i) {
    fact[i] = fact[i - 1] * i;
    fact[i] %= mod;
  }
}
long long aCb(long long a, long long b) {
  if (a < b or b < 0) {
    return 0;
  }
  return ((fact[a] * pw((fact[b] * fact[a - b]) % mod, mod - 2)) % mod);
}
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  precalc();
  cin >> p >> s >> r;
  for (long long i = 1, sgn = 1; i <= p; ++i, sgn *= -1) {
    winHasMoreThanr +=
        sgn * ((aCb(p, i) * aCb(s - i * r + p - 1, p - 1)) % mod);
    winHasMoreThanr %= mod;
    if (winHasMoreThanr < 0) {
      winHasMoreThanr += mod;
    }
  }
  oneHasMoreThanr = aCb(s - r + p - 1, p - 1);
  ans = winHasMoreThanr;
  ans *= pw(p, mod - 2);
  ans %= mod;
  ans *= pw(oneHasMoreThanr, mod - 2);
  ans %= mod;
  cout << ans;
}
