title: Divisibility 9 Using Bitwise Operators
signature: function divisibility9UsingBitwiseOperators($n) {
test_code: <?php
  
  
  // SOLUTION CODE 
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function validateSolution($actual, $expected){
      return serialize($actual) == serialize($expected);
  }
  
  function driver($n, $expected){
      try{
        if (validateSolution(PLACEHOLDER_FN_NAME($n), $expected)){
          return "PASSED";
        }
        return "FAILED";
      }
      catch (Exception $exception_obj) {
        return get_class($exception_obj);
      }
  }
  
  function main(){
      printf("TEST-0...%s\n",driver(
        96, 
        false));
      
      printf("TEST-1...%s\n",driver(
        85, 
        false));
      
      printf("TEST-2...%s\n",driver(
        54, 
        true));
      
      printf("TEST-3...%s\n",driver(
        14, 
        false));
      
      printf("TEST-4...%s\n",driver(
        47, 
        false));
      
      printf("TEST-5...%s\n",driver(
        11, 
        false));
      
      printf("TEST-6...%s\n",driver(
        49, 
        false));
      
      printf("TEST-7...%s\n",driver(
        99, 
        true));
      
      printf("TEST-8...%s\n",driver(
        28, 
        false));
      
      printf("TEST-9...%s\n",driver(
        82, 
        false));
      
  }
  
  main();
  ?>
source_py: def divisibility_9_using_bitwise_operators(n):
      if ((n == 0) or (n == 9)):
          return True
      if (n < 9):
          return False
      return divisibility_9_using_bitwise_operators((int((n >> 3)) - int((n & 7))))
source_cpp: bool divisibility_9_using_bitwise_operators(int n) {
    if ( n == 0 || n == 9 ) return true;
    if ( n < 9 ) return false;
    return divisibility_9_using_bitwise_operators ( ( int ) ( n >> 3 ) - ( int ) ( n & 7 ) );
  }