#include<bits/stdc++.h>
using namespace std;

using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define RETURN( ANSWER ) cout << ( ANSWER ) << "\n"; return 0 

constexpr const ll P = 998244353;

int main(){
  CIN( ll , N );
  assert( 1 <= N && N <= 1000000000 );
  ll answer = 1;
  ll power = 3;
  while( N != 0 ){
    if( N % 2 == 1 ){
      answer = ( answer * power ) % P;
    }
    power = ( power * power ) % P;
    N /= 2;
  }
  RETURN( answer );
}