static int totalPairs ( int arr1 [ ] , int arr2 [ ] , int n , int m ) {
  HashSet < Integer > s1 = new HashSet < Integer > ( ) ;
  HashSet < Integer > s2 = new HashSet < Integer > ( ) ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) s2 . add ( arr2 [ i ] ) ;
  int count = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( ! s1 . contains ( arr1 [ i ] ) ) {
      if ( s2 . contains ( invertBits ( arr1 [ i ] ) ) ) {
        count ++ ;
        s1 . add ( arr1 [ i ] ) ;
      }
    }
  }
  return count ;
}

static int totalPairs ( int arr1 [ ] , int arr2 [ ] , int n , int m ) { HashSet < Integer > s1 = new HashSet < Integer > ( ) ; HashSet < Integer > s2 = new HashSet < Integer > ( ) ; for ( int i = 0 ; i < m ; i ++ ) s2 . add ( arr2 [ i ] ) ; int count = 0 ; for ( int i = 0 ; i < n ; i ++ ) { if ( ! s1 . contains ( arr1 [ i ] ) ) { if ( s2 . contains ( invertBits ( arr1 [ i ] ) ) ) { count ++ ; s1 . add ( arr1 [ i ] ) ; } } } return count ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments (type_identifier))) arguments: (argument_list)))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments (type_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: (identifier)) update: (update_expression (identifier)) body: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (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 (if_statement condition: (parenthesized_expression (unary_expression operand: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))))) consequence: (block (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier))))))) consequence: (block (expression_statement (update_expression (identifier))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier))))))))))) (return_statement (identifier))))