public static boolean xor ( int i , int j , int sum ) {
  if ( i > N ) {
    if ( sum == 0 ) {
      return true ;
    }
    else {
      return false ;
    }
  }
  sum ^= T [ i ] [ j ] ;
  boolean hasBug = false ;
  for ( int k = 1 ;
  k <= K ;
  k ++ ) {
    hasBug = hasBug || xor ( i + 1 , k , sum ) ;
  }
  return hasBug ;
}

public static boolean xor ( int i , int j , int sum ) { if ( i > N ) { if ( sum == 0 ) { return true ; } else { return false ; } } sum ^= T [ i ] [ j ] ; boolean hasBug = false ; for ( int k = 1 ; k <= K ; k ++ ) { hasBug = hasBug || xor ( i + 1 , k , sum ) ; } return hasBug ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (return_statement (true))) alternative: (block (return_statement (false)))))) (expression_statement (assignment_expression left: (identifier) right: (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (false))) (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 (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)) (identifier) (identifier)))))))) (return_statement (identifier))))