public static void main ( String [ ] args ) throws IOException {
  FastReader fr = new FastReader ( ) ;
  PrintWriter pr = new PrintWriter ( new OutputStreamWriter ( System . out ) ) ;
  n = fr . nextInt ( ) ;
  map = new ArrayList < > ( ) ;
  vis = new boolean [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    map . add ( new Node ( i ) ) ;
  };
}

public static void main ( String [ ] args ) throws IOException { FastReader fr = new FastReader ( ) ; PrintWriter pr = new PrintWriter ( new OutputStreamWriter ( System . out ) ) ; n = fr . nextInt ( ) ; map = new ArrayList < > ( ) ; vis = new boolean [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { map . add ( new Node ( i ) ) ; } ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (assignment_expression left: (identifier) right: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) arguments: (argument_list)))) (expression_statement (assignment_expression left: (identifier) right: (array_creation_expression type: (boolean_type) dimensions: (dimensions_expr (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: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (identifier))))))))))