import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################
def f(x):
    r = 0
    while x > 0:
        r ^= x%2
        x //= 2
    return r
n, m = na()
mod = 998244353
d = 30
if m < d:
    ans = 0
    for i in range(m):
        ans ^= n << i
    print(ans%mod)
else:
    ans = 0
    for i in range(d):
        ans ^= n<<i
    a = ans & ((1<<d)-1)
    b = (ans - a)>>d
    z = f(n)
    ans = a + b * pow(2, m, mod) + z * pow(2,d)*(pow(2,m-d,mod)-1)
    print(ans%mod)