public static void main ( String args [ ] ) {
  Scanner in = new Scanner ( System . in ) ;
  long n = in . nextLong ( ) ;
  long pow3 = 1 ;
  while ( pow3 <= 3 * n ) {
    if ( n % pow3 != 0 ) {
      System . out . println ( n / pow3 + 1 ) ;
      return ;
    }
    pow3 = pow3 * 3 ;
  }
}

public static void main ( String args [ ] ) { Scanner in = new Scanner ( System . in ) ; long n = in . nextLong ( ) ; long pow3 = 1 ; while ( pow3 <= 3 * n ) { if ( n % pow3 != 0 ) { System . out . println ( n / pow3 + 1 ) ; return ; } pow3 = pow3 * 3 ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (decimal_integer_literal) right: (identifier)))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))))) (return_statement))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))))))