// 嘘解法チェック

#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 );
  N %= P - 1;
  ll answer = 1;
  while( N != 0 ){
    answer = ( answer * 3 ) % P;
    N--;
  }
  RETURN( answer );
}