public static void main ( String [ ] args ) {
  head = null ;
  push ( head , 5 ) ;
  push ( head , 4 ) ;
  push ( head , 3 ) ;
  push ( head , 5 ) ;
  push ( head , 3 ) ;
  push ( head , 2 ) ;
  push ( head , 4 ) ;
  push ( head , 4 ) ;
  push ( head , 1 ) ;
  uniqueElements ( head ) ;
}

public static void main ( String [ ] args ) { head = null ; push ( head , 5 ) ; push ( head , 4 ) ; push ( head , 3 ) ; push ( head , 5 ) ; push ( head , 3 ) ; push ( head , 2 ) ; push ( head , 4 ) ; push ( head , 4 ) ; push ( head , 1 ) ; uniqueElements ( head ) ; }
(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 (expression_statement (assignment_expression left: (identifier) right: (null_literal))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier))))))