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

FACT=[1]
for i in range(1,2*10**6+1):
    FACT.append(FACT[-1]*i%mod)

FACT_INV=[pow(FACT[-1],mod-2,mod)]
for i in range(2*10**6,0,-1):
    FACT_INV.append(FACT_INV[-1]*i%mod)

FACT_INV.reverse()

q=M//N
r=M%N
ANS=[q]*N
for i in range(r):
    ANS[i]+=1

L=FACT[M]
for ans in ANS:
    L=L*FACT_INV[ans]%mod

print(L)