import std;

void main () {
    const long MOD = 998244353;
    int N = readln.chomp.to!int;
    auto A = readln.split.to!(int[]);

    foreach (i; 0 .. 10) {
        writefln("%05b", i);
    }

    // bitごとに考える
    const int B = 25;

    long ans = 0;
    foreach (b; 0 .. B) {
        int zero = N / (2 * (1 << b)) * (1 << b) + min(N % (2 * (1 << b)), 1 << b);
        int one = N - zero;

        // writeln(N / (2 * (1 << b)));
        // writefln("b: %s zero: %s one: %s", b, zero, one);

        long add = 0;
        foreach (i; 0 .. N) {
            int p = ((i >> b) & 1);

            int x = (p == 0 ? one : zero);
            add += 1L * (1 << b) * x % MOD * A[i] % MOD;
            add %= MOD;
        }

        ans += add;
        ans %= MOD;
    }

    writeln(ans);
}

void read (T...) (string S, ref T args) {
    import std.conv : to;
    import std.array : split;
    auto buf = S.split;
    foreach (i, ref arg; args) {
        arg = buf[i].to!(typeof(arg));
    }
}