title: Find Whether A Given Number Is A Power Of 4 Or Not 2
signature: function find_whether_a_given_number_is_a_power_of_4_or_not_2(n)
source_py: def find_whether_a_given_number_is_a_power_of_4_or_not_2(n):
      return ((n != 0) and ((n & (n - 1)) == 0) and (not (n & 2863311530)))
source_cpp: bool find_whether_a_given_number_is_a_power_of_4_or_not_2(unsigned int n) {
    return n != 0 && ( ( n & ( n - 1 ) ) == 0 ) && ! ( n & 0xAAAAAAAA );
  }
question_info.test_code: 
  
  -- SOLUTION CODE
  -- ============================================
  PLACEHOLDER_CODE_BODY
  
  -- TESTING CODE 
  -- ============================================
  function isCorrect(actual, expected)
      if type(expected) ~= type(actual) then
          return false
      end
      
      if type(expected) == 'table' then
          for k,v_expected in pairs(expected) do
              
              if actual[k] == nil then
                  return false
              end
              local v_actual = actual[k]
              if not isCorrect(v_actual, v_expected) then
                  return false
              end
              actual[k]=nil
          end
      
          if next(actual) then 
              return false
          end
          return true
      else
          return actual == expected
      end
  end
  
  function validateSolution(actual, expected)
      return isCorrect(actual,expected)
  end
  
  function driver(n, expected)
      local exec_result;
      local status, error_msg = pcall(function () 
          exec_result=PLACEHOLDER_FN_NAME(n) 
      end)
      if status then
          if validateSolution(exec_result,expected) then
              return "PASSED"
          end
          return "FAILED"
      else
          return string.format("ERROR=%s",string.gsub(error_msg,".*:[%d]+: ",""))
      end
  end
      
  function main()
      result = driver(1, true)
      print(string.format("TEST-0...%s",result))
  
      result = driver(4, true)
      print(string.format("TEST-1...%s",result))
  
      result = driver(64, true)
      print(string.format("TEST-2...%s",result))
  
      result = driver(-64, false)
      print(string.format("TEST-3...%s",result))
  
      result = driver(128, false)
      print(string.format("TEST-4...%s",result))
  
      result = driver(1024, true)
      print(string.format("TEST-5...%s",result))
  
      result = driver(97, false)
      print(string.format("TEST-6...%s",result))
  
      result = driver(86, false)
      print(string.format("TEST-7...%s",result))
  
      result = driver(14, false)
      print(string.format("TEST-8...%s",result))
  
      result = driver(99, false)
      print(string.format("TEST-9...%s",result))
  
  end
  
  main()
question_info.entry_cls_name: Solution
question_info.test_list: [{"idx": 0, "outputs": true, "inputs": {"n": 1}}, {"idx": 1, "outputs": true, "inputs": {"n": 4}}, {"idx": 2, "outputs": true, "inputs": {"n": 64}}, {"idx": 3, "outputs": false, "inputs": {"n": -64}}, {"idx": 4, "outputs": false, "inputs": {"n": 128}}, {"idx": 5, "outputs": true, "inputs": {"n": 1024}}, {"idx": 6, "outputs": false, "inputs": {"n": 97}}, {"idx": 7, "outputs": false, "inputs": {"n": 86}}, {"idx": 8, "outputs": false, "inputs": {"n": 14}}, {"idx": 9, "outputs": false, "inputs": {"n": 99}}]
question_info.extension: lua
question_info.entry_fn_name: find_whether_a_given_number_is_a_power_of_4_or_not_2
question_info.test_case_ids: 0 1 2 3 4 5 6 7 8 9
question_info.commands: lua __FILENAME__