func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e6 + 10;   long long gcd(long long p, long long q) { return q == 0 ? p : gcd(q, p % q); }   int to[4][2] = {{-1, 0}, {1, 0}, {0, -1}, {0, 1}};   long long n, ans;   long long qp(long long a, long long b) {     long long s = 1;     while (b) {       if (b & 1) s = s * a % 998244353;       a = a * a % 998244353;       b >>= 1;     }     return s;   }   int main() {     ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);     cin >> n;     ans = (qp(3, n * n) - qp(qp(3, n) - 3, n) + 998244353) % 998244353;     long long xs = -1, c1 = 1;     for (int i = 1; i <= n; i++) {       xs *= -1;       c1 = c1 * (n - i + 1) % 998244353;       c1 = c1 * qp(i, 998244353 - 2) % 998244353;       ans += xs *              (3 * c1 % 998244353 * qp(qp(3, n - i) - 1, n) % 998244353 +               c1 * (qp(3, i) - 3) % 998244353 * qp(3, (n - i) * n) % 998244353) %              998244353;     }     ans = (ans % 998244353 + 998244353) % 998244353;     cout << ans << endl;     return 0;   }   