public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int s = sc . nextInt ( ) ;
  int m = 1 ;
  for ( int i = 0 ;
  i < 10000 ;
  i ++ ) {
    if ( s == 4 || s == 2 || s == 1 ) {
      break ;
    }
    if ( s % 2 == 0 ) {
      s = s / 2 ;
      m = m + 1 ;
    }
    else {
      s = ( s * 3 ) + 1 ;
      m = m + 1 ;
    }
  }
  m = m + 3 ;
  System . out . println ( m ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int s = sc . nextInt ( ) ; int m = 1 ; for ( int i = 0 ; i < 10000 ; i ++ ) { if ( s == 4 || s == 2 || s == 1 ) { break ; } if ( s % 2 == 0 ) { s = s / 2 ; m = m + 1 ; } else { s = ( s * 3 ) + 1 ; m = m + 1 ; } } m = m + 3 ; System . out . println ( m ) ; }
(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) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (break_statement))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))