import sys
input = sys.stdin.readline
from collections import *

N, M = map(int, input().split())
bit = []

for i in range(35):
    bit.append((N>>i)&1)

ans = 0
MOD = 998244353

if len(bit)<=M:
    lx = 0
    
    for i in range(len(bit)-1):
        lx ^= bit[i]
        ans += lx*pow(2, i, MOD)
        ans %= MOD
    
    rx = 0
    
    for i in range(len(bit)+M-2, M-1, -1):
        rx ^= bit[i-M+1]
        ans += rx*pow(2, i, MOD)
        ans %= MOD
    
    ans += lx*pow(2, len(bit)-1, MOD)*(pow(2, M-len(bit)+1, MOD)-1)%MOD
    ans %= MOD
else:
    for i in range(M):
        ans ^= N*pow(2, i, MOD)
        ans %= MOD
    
print(ans)