public static void B ( ) {
  Scanner sc = new Scanner ( System . in ) ;
  int N = sc . nextInt ( ) ;
  if ( N == 1 ) {
    System . out . println ( 1 ) ;
    return ;
  }
  sc . close ( ) ;
  long Li = 2 ;
  long Lj = 1 ;
  long temp ;
  for ( int i = 2 ;
  i < N + 1 ;
  i ++ ) {
    temp = Lj ;
    Lj = Li + Lj ;
    Li = temp ;
  }
  System . out . println ( Lj ) ;
}

public static void B ( ) { Scanner sc = new Scanner ( System . in ) ; int N = sc . nextInt ( ) ; if ( N == 1 ) { System . out . println ( 1 ) ; return ; } sc . close ( ) ; long Li = 2 ; long Lj = 1 ; long temp ; for ( int i = 2 ; i < N + 1 ; i ++ ) { temp = Lj ; Lj = Li + Lj ; Li = temp ; } System . out . println ( Lj ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters) 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)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (decimal_integer_literal)))) (return_statement))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))