import sys
#input = sys.stdin.readline
#input = sys.stdin.buffer.readline #文字列はダメ
#sys.setrecursionlimit(1000000)
import math
import bisect
#import itertools
#import random
#from heapq import heapify, heappop, heappush
from collections import defaultdict
from collections import deque
#import copy #DeepCopy: hoge = [_[:] for _ in hogehoge]
#from functools import lru_cache
#@lru_cache(maxsize=None)
#MOD = pow(10,9) + 7
MOD = 998244353
#dx = [1,0,-1,0]
#dy = [0,1,0,-1]
#dx8 = [1,1,0,-1,-1,-1,0,1]
#dy8 = [0,1,1,1,0,-1,-1,-1]

def cmb(n, r, p):
  if (r < 0) or (n < r):
    return 0
  r = min(r, n - r)
  ret = fac[n] * finv[r] % p
  ret = ret * finv[n-r] % p
  return ret

def cmb_inv(n, r, p):
  if (r < 0) or (n < r):
    return 0
  r = min(r, n - r)
  ret = fac[n-r] * fac[r] % p
  ret = ret * finv[n] % p 
  return ret


def perm(n,r,p):
  if (r < 0) or (n < r):
    return 0
  return fac[n]*finv[n-r]%p

n = 1500000
#MODは自分で入れよう！

fac = [-1]*(n+1); fac[0] = 1; fac[1] = 1 #階乗
finv = [-1]*(n+1); finv[0] = 1; finv[1] = 1 #階乗の逆元
inv = [-1]*(n+1); inv[0] = 0; inv[1] = 1 #逆元
for i in range(2,n+1):
  fac[i] = fac[i-1]*i%MOD
  inv[i] = MOD - inv[MOD%i]*(MOD//i)%MOD
  finv[i] = finv[i-1]*inv[i]%MOD

def main():
    N,M = map(int,input().split())
    x = M//N
    a = M - N*x
    b = N - a
    ans = fac[M] * pow(finv[x+1],a,MOD) * pow(finv[x],b,MOD)%MOD
    print(ans)
    

if __name__ == '__main__':
    main()