N,M = map(int,input().split())
q = M // N
r = M % N
d = N - r
P = 998244353
ans = 1
tmp = 1
for i in range(2,q+1):
    tmp = tmp * i % P
ans = pow(tmp,d,P)
tmp = tmp * (q + 1) % P
ans = ans * pow(tmp,r,P) % P
t = 1
for i in range(2,M + 1):
    t = t * i % P
ans = t * pow(ans,P - 2,P) % P
print(ans)