public static int nobleInteger ( int arr [ ] ) {
  Arrays . sort ( arr ) ;
  int n = arr . length ;
  for ( int i = 0 ;
  i < n - 1 ;
  i ++ ) {
    if ( arr [ i ] == arr [ i + 1 ] ) continue ;
    if ( arr [ i ] == n - i - 1 ) return arr [ i ] ;
  }
  if ( arr [ n - 1 ] == 0 ) return arr [ n - 1 ] ;
  return - 1 ;
}

public static int nobleInteger ( int arr [ ] ) { Arrays . sort ( arr ) ; int n = arr . length ; for ( int i = 0 ; i < n - 1 ; i ++ ) { if ( arr [ i ] == arr [ i + 1 ] ) continue ; if ( arr [ i ] == n - i - 1 ) return arr [ i ] ; } if ( arr [ n - 1 ] == 0 ) return arr [ n - 1 ] ; return - 1 ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions))) body: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (field_access object: (identifier) field: (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 (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))) consequence: (continue_statement)) (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal)))) consequence: (return_statement (array_access array: (identifier) index: (identifier)))))) (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal))) consequence: (return_statement (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))) (return_statement (unary_expression operand: (decimal_integer_literal)))))