public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( in ) ;
  String s = sc . next ( ) ;
  for ( int i = 0 ;
  i < s . length ( ) / 2 ;
  i ++ ) {
    if ( s . charAt ( i ) != s . charAt ( s . length ( ) - 1 - i ) ) {
      out . println ( "NO" ) ;
      exit ( 0 ) ;
    }
  }
  out . println ( "YES" ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( in ) ; String s = sc . next ( ) ; for ( int i = 0 ; i < s . length ( ) / 2 ; i ++ ) { if ( s . charAt ( i ) != s . charAt ( s . length ( ) - 1 - i ) ) { out . println ( " NO " ) ; exit ( 0 ) ; } } out . println ( " YES " ) ; }
(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 (identifier))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (decimal_integer_literal))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (decimal_integer_literal)) right: (identifier)))))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (decimal_integer_literal)))))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (string_literal))))))