N, M = map(int, input().split())
mod = 998244353
ans = 0
if M <= 100:
    for i in range(M):
        ans ^= N << i
    print(ans%mod)
    exit()
    
if N == 0:
    print(0)
    exit()
    
K = 0
temp = N
while temp:
    temp //= 2
    K += 1
keta = M - K - 1

up, down, all = 0, 0, 0
for i in range(N):
    up ^= (N >> i)
    down ^= (N << i) % (1 << K)
    all ^= (N >> i) & 1
    
middle = 0
if all:
    middle = pow(2, keta, mod) - 1
    
ans = down + middle * pow(2, K, mod) + up * pow(2, K + keta, mod)
print(ans%mod)