public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int s = sc . nextInt ( ) ;
  int index ;
  sc . close ( ) ;
  ArrayList < Integer > data = new ArrayList < Integer > ( ) ;
  while ( true ) {
    index = data . indexOf ( s ) ;
    data . add ( s ) ;
    if ( index == - 1 ) {
      s = f ( s ) ;
    }
    else {
      break ;
    }
  }
  System . out . println ( data . size ( ) ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int s = sc . nextInt ( ) ; int index ; sc . close ( ) ; ArrayList < Integer > data = new ArrayList < Integer > ( ) ; while ( true ) { index = data . indexOf ( s ) ; data . add ( s ) ; if ( index == - 1 ) { s = f ( s ) ; } else { break ; } } System . out . println ( data . size ( ) ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) 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))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments (type_identifier))) arguments: (argument_list)))) (while_statement condition: (parenthesized_expression (true)) body: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (unary_expression operand: (decimal_integer_literal)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation name: (identifier) arguments: (argument_list (identifier)))))) alternative: (block (break_statement))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))))