#include <bits/stdc++.h>
using namespace std;
//#include<atcoder/all>
//using namespace atcoder;
using ll = long long int;
using ull = unsigned long long int;
using ld = long double;
constexpr ll MAX = 2000000000000000000;
constexpr ld PI = 3.14159265358979;
constexpr ll MOD = 998244353;//2024948111;
ld dotorad(ld K){ return PI * K / 180.0; }
ld radtodo(ld K){ return K * 180.0 / PI; }
mt19937 mt;
void randinit(){ srand((unsigned)time(NULL));mt = mt19937(rand()); }
vector<ll> fac,finv,inv;
void COMinit(ll n = 1000000){
    fac.resize(n);
    finv.resize(n);
    inv.resize(n);
    inv[1] = 1;
    fac[0] = fac[1] = 1;
    finv[0] = finv[1] = 1;
    ll i;
    for(i = 2;i < n;i++){
        fac[i] = (fac[i - 1] * i) % MOD;
        inv[i] = MOD - ((inv[MOD % i] * (MOD / i)) % MOD);
        finv[i] = (finv[i - 1] * inv[i]) % MOD;
    }
}
ll COM(ll n,ll m){
    //nCm
    if(n < m) return 0;
    if(n < 0 || m < 0) return 0;
    return (fac[n] * (finv[m] * finv[n - m] % MOD)) % MOD;
}
ll f(ll a,ll b){
    return COM(a + b,a);
}

int main(){
    COMinit(10000000);
    ll N,M;
    cin >> N >> M;
    ll ans = fac[M];
    ll x = M / N,y = x + 1;
    for(ll i = 0;i < N - (M % N);i++){
        ans *= finv[x];
        ans %= MOD;
    }
    for(ll i = 0;i < M % N;i++){
        ans *= finv[y];
        ans %= MOD;
    }
    cout << ans << endl;
}