#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include <map>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <stack>
#include <algorithm>
#include <array>
#include <unordered_set>
#include <unordered_map>
#include <string>
using namespace std;

bool rcmp(int a, int b) { return a>b; }
typedef long long LL;
class mypcmp {
public:
    bool operator()(const int& a, const int& b) {
        return a<b;
    }
};

#define MOD 998244353
int expit(LL b, int e) {
    LL r=1;
    while(e) {
        if (e&1) { r*=b; r%=MOD; }
        b*=b; b%=MOD;
        e>>=1;
    }
    return r;
}
int main() {
    int n, i, m, a, b;
    LL r, v, vv;
    scanf("%d %d", &n, &m);
    a = m/n;
    b = m%n;
    r=1;
    v=1; for (i=1; i<=m; i++) {
        v*=i; v%=MOD;
        if (i==a) {
            vv=expit(v, MOD-2);
            r*=expit(vv, n-b); r%=MOD;
        } else if (i==a+1&&b) {
            vv=expit(v, MOD-2);
            r*=expit(vv, b); r%=MOD;
        }
    }
    r*=v; r%=MOD;
    printf("%lld\n", r);
    return 0;
}