## https://yukicoder.me/problems/no/1952

MOD = 998244353

def main():
    N, M = map(int, input().split())
    if N == 0:
        print(0)
        return

    n = N
    array = []
    while n > 0:
        array.append(n % 2)
        n //= 2
    N0 = len(array)

    if M > 2 * N0:
        s = sum(array)
        if s % 2 == 1:
            b = pow(2, M - 1, MOD) - 1
            b %= MOD
            c = pow(2, N0, MOD) - 1
            c %= MOD
            answer = (b - c) % MOD
        else:
            answer = 0

        # 前半
        array1 = [0] * N0
        for i in range(N0):
            for j in range(N0):
                if i + j < N0:
                    array1[i + j] += array[j]
                    array1[i + j] %= 2
        p = 1
        ans = 0
        for i in range(len(array1)):
            if array1[i] > 0:
                ans += p
                ans %= MOD
            p *= 2
            p %= MOD
        answer += ans
        answer %= MOD
        
        # 後半
        array2 = [0] * N0
        for i in range(N0):
            for j in range(N0):
                if j - i >= 0:
                    array2[j - i] += array[j]
                    array2[j - i] %= 2

        p = pow(2, M - 1, MOD)
        for i in range(N0):
            if array2[i] > 0:
                answer += p
                answer %= MOD
            p *= 2
            p %= MOD
        print(answer)
    else:
        array1 = [0] * M
        array1 += [0] * N0
        for i in range(M):
            for j in range(N0):
                array1[i + j] += array[j]
                array1[i + j] %= 2

        p = 1
        ans = 0
        for i in range(len(array1)):
            if array1[i] > 0:
                ans += p
                ans %= MOD
            p *= 2
            p %= MOD
        print(ans)






if __name__ == "__main__":
    main()