#include <iostream>
#include <vector>
using namespace std;

#include <atcoder/convolution>
#include <atcoder/modint>

using mint = atcoder::modint998244353;

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);

    int N;
    cin >> N;

    vector<long long> A(N);
    for (auto &a : A) cin >> a;

    auto rec = [&](auto &&self, int l, int r) -> vector<mint> {
        if (l + 1 == r) return {1, A.at(l)};
        const int c = (l + r) / 2;
        return atcoder::convolution(self(self, l, c), self(self, c, r));
    };

    vector<mint> dp = rec(rec, 0, N);

    mint ret = 0;
    for (int n = 1; n <= N; ++n) ret += dp.at(n) * mint(n).pow(N - n);

    cout << ret.val() << '\n';
}