"""

"""

import sys
from sys import stdin
from collections import deque
import heapq

def popcnt(X):

    ret = 0
    while X:
        ret += X % 2
        X //= 2
    return ret % 2

N,M = map(int,stdin.readline().split())
NR = N.bit_length()

mod = 998244353

if M <= 70:
    ans = 0
    for i in range(M):
        ans ^= N
        N *= 2
    print (ans % mod)

else:

    minbit = 0
    NN = N
    for i in range(70):
        minbit ^= NN
        NN *= 2

    maxbit = 0
    NN = N
    for i in range(70):
        maxbit ^= NN
        NN //= 2

    ans = 0
    cnt = popcnt(N)
    if cnt == 0:
        pass
    else:
        ans += ( pow(2,M-NR+1,mod)-1 ) * pow(2,NR-1,mod)
        ans %= mod

    for i in range(NR-1):
        ans += minbit & (2**i)

    
    for i in range(1,NR):
        ans += (maxbit & (2**i)) * pow(2,M-1,mod)

    ans %= mod

    print (ans)