mod = 998244353
div2 = pow(2, mod-2, mod)


def solve(N, M):
    res = 0
    K = N.bit_length()

    cnt = 0
    for i in range(K - 1):
        cnt ^= (N >> i) & 1
        res += (1 << i) * cnt
        res %= mod

    two = pow(2, K + M - 1, mod)
    cnt = 0
    for i in range(1, K)[::-1]:
        cnt ^= (N >> i) & 1
        two = two * div2 % mod
        res += two * cnt
        res %= mod

    if bin(N).count("1") % 2 == 1:
        res += pow(2, M, mod) - pow(2, K - 1, mod)
        res %= mod

    return res


def solve_naive(N, M):
    ans = 0
    for i in range(M):
        ans ^= N << i
    return ans % mod


def main():
    N, M = map(int, input().split())
    if N == 0:
        return 0
    if M < 30:
        return solve_naive(N, M)
    return solve(N, M)


print(main())