mod = 998244353
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    N = int(input())
    A = list(map(int, input().split()))

    if N == 1:
        print(665496236)
    else:
        S = sum(A)
        g = 0
        for a in A:
            g ^= a
        if g:
            ma = 0
            for a in A:
                if a >= a ^ g:
                    ma = max(ma, (a - (a ^ g)))
            S -= ma
            S += 1
            lower = pow(3, S, mod)
            upper = ((lower + 1) * pow(2, mod-2, mod))%mod
            print((upper * pow(lower, mod-2, mod))%mod)
        else:
            lower = pow(3, S, mod)
            upper = ((lower - 1) * pow(2, mod - 2, mod)) % mod
            print((upper * pow(lower, mod - 2, mod)) % mod)


if __name__ == '__main__':
    main()