public static void main ( String [ ] args ) {
  char [ ] in = s . next ( ) . toCharArray ( ) ;
  for ( int i = in . length / 2 ;
  i >= 0 ;
  i -- ) {
    if ( in [ in . length - i - 1 ] != in [ i ] ) {
      System . out . println ( "NO" ) ;
      return ;
    }
  }
  System . out . println ( "YES" ) ;
}

public static void main ( String [ ] args ) { char [ ] in = s . next ( ) . toCharArray ( ) ; for ( int i = in . length / 2 ; i >= 0 ; i -- ) { if ( in [ in . length - i - 1 ] != in [ i ] ) { System . out . println ( " NO " ) ; return ; } } System . 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: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (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: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (identifier)) right: (decimal_integer_literal))) right: (array_access array: (identifier) index: (identifier)))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (return_statement))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))))