#include <iostream>
using namespace std;
typedef long long ll;

ll my_pow(ll x, ll n, ll mod){
    ll ret;
    if (n == 0){
        ret = 1;
    }
    else if (n % 2 == 0){
        ret = my_pow((x * x) % mod, n / 2, mod);
    }
    else{
        ret = (x * my_pow((x * x) % mod, n / 2, mod)) % mod;
    }
    return ret;
}

int main(){
    ll N;
    cin >> N;
    ll mod = 998244353;
    cout << my_pow(3, N, mod) << endl;
}