private static void calc ( int n ) {
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    int power = 1 ;
    int ans = Integer . MAX_VALUE ;
    while ( 0 <= i - power ) {
      ans = Math . min ( ans , 1 + dp [ i - power ] ) ;
      power *= 6 ;
    }
    power = 1 ;
    while ( 0 <= i - power ) {
      ans = Math . min ( ans , 1 + dp [ i - power ] ) ;
      power *= 9 ;
    }
    dp [ i ] = ans ;
  }
}

private static void calc ( int n ) { for ( int i = 1 ; i <= n ; i ++ ) { int power = 1 ; int ans = Integer . MAX_VALUE ; while ( 0 <= i - power ) { ans = Math . min ( ans , 1 + dp [ i - power ] ) ; power *= 6 ; } power = 1 ; while ( 0 <= i - power ) { ans = Math . min ( ans , 1 + dp [ i - power ] ) ; power *= 9 ; } dp [ i ] = ans ; } }
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