import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################
n, m = na()
a, b = m//n, m % n
r = 1
mod = 998244353
for i in range(1, m + 1):
    r *= i
    r %= mod
A = 1
for i in range(1, a + 1):
    A *= i
    A %= mod
B = A * (a + 1) % mod

print(r*pow(pow(A, n-b, mod),mod-2,mod)*pow(pow(B, b, mod),mod-2,mod)%mod)