mod = 998244353

def comb(n, m):
    out = 1
    for i in range(m):
        out *= n-i
        out //= i + 1
        out %= mod
    return out

n, m = map(int, input().split(" "))

avg = m // n
res = m % n

ans = 1
cnt = 0
for i in range(n - res):
    ans *= comb(m - cnt, avg)
    ans %= mod
    cnt += avg
for i in range(n-res, n):
    ans *= comb(m - cnt, avg+1)
    ans %= mod
    cnt += avg+1

print(ans)