static int countPairs ( int a [ ] , int n ) {
  int count = 0 ;
  for ( int i = 0 ;
  i < n - 1 ;
  i ++ ) {
    int setbits_x = setBits ( a [ i ] ) ;
    for ( int j = i + 1 ;
    j < n ;
    j ++ ) {
      int setbits_y = setBits ( a [ j ] ) ;
      int setbits_xor_xy = setBits ( a [ i ] ^ a [ j ] ) ;
      if ( setbits_x + setbits_y == setbits_xor_xy ) count ++ ;
    }
  }
  return count ;
}

static int countPairs ( int a [ ] , int n ) { int count = 0 ; for ( int i = 0 ; i < n - 1 ; i ++ ) { int setbits_x = setBits ( a [ i ] ) ; for ( int j = i + 1 ; j < n ; j ++ ) { int setbits_y = setBits ( a [ j ] ) ; int setbits_xor_xy = setBits ( a [ i ] ^ a [ j ] ) ; if ( setbits_x + setbits_y == setbits_xor_xy ) count ++ ; } } 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))) body: (block (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: (binary_expression left: (identifier) right: (decimal_integer_literal))) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (identifier))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (identifier))) consequence: (expression_statement (update_expression (identifier)))))))) (return_statement (identifier))))