MOD = 998244353
N,M = list(map(int,input().split()))

frac = [1]
for i in range(1,10**6+10):
    frac.append(frac[-1] * i % MOD)

def nCr(n,r):
    return frac[n] * pow(frac[n-r],-1,MOD) % MOD * pow(frac[r],-1,MOD) % MOD

A = [M//N] * N
for i in range(M%N):A[i] += 1
now = M
ans = 1
for i in range(N):
    ans *= nCr(now,A[i])
    ans %= MOD
    now -= A[i]
print(ans)