title: Check String Follows Anbn Pattern Not
signature: function check_string_follows_anbn_pattern_not(str)
source_py: def check_string_follows_anbn_pattern_not(str):
      n = len(str)
      for i in range(n):
          if (str[i] != 'a'):
              break
      if ((i * 2) != n):
          return False
      for j in range(i, n):
          if (str[j] != 'b'):
              return False
      return True
source_cpp: bool check_string_follows_anbn_pattern_not(string str) {
    int n = str . length ( );
    int i;
    for ( i = 0;
    i < n;
    i ++ ) if ( str [ i ] != 'a' ) break;
    if ( i * 2 != n ) return false;
    int j;
    for ( j = i;
    j < n;
    j ++ ) if ( str [ j ] != 'b' ) return false;
    return true;
  }
question_info.entry_fn_name: check_string_follows_anbn_pattern_not
question_info.entry_cls_name: Solution
question_info.test_case_ids: ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
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(str, expected)
      local exec_result;
      local status, error_msg = pcall(function () 
          exec_result=PLACEHOLDER_FN_NAME(str) 
      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("ba", false)
      print(string.format("TEST-0...%s",result))
  
      result = driver("aabb", true)
      print(string.format("TEST-1...%s",result))
  
      result = driver("abab", false)
      print(string.format("TEST-2...%s",result))
  
      result = driver("aaabb", false)
      print(string.format("TEST-3...%s",result))
  
      result = driver("aabbb", false)
      print(string.format("TEST-4...%s",result))
  
      result = driver("abaabbaa", false)
      print(string.format("TEST-5...%s",result))
  
      result = driver("abaababb", false)
      print(string.format("TEST-6...%s",result))
  
      result = driver("bbaa", false)
      print(string.format("TEST-7...%s",result))
  
      result = driver("11001000", false)
      print(string.format("TEST-8...%s",result))
  
      result = driver("ZWXv te", false)
      print(string.format("TEST-9...%s",result))
  
  end
  
  main()
question_info.test_list: [{"idx": 0, "outputs": false, "inputs": {"str": "ba"}}, {"idx": 1, "outputs": true, "inputs": {"str": "aabb"}}, {"idx": 2, "outputs": false, "inputs": {"str": "abab"}}, {"idx": 3, "outputs": false, "inputs": {"str": "aaabb"}}, {"idx": 4, "outputs": false, "inputs": {"str": "aabbb"}}, {"idx": 5, "outputs": false, "inputs": {"str": "abaabbaa"}}, {"idx": 6, "outputs": false, "inputs": {"str": "abaababb"}}, {"idx": 7, "outputs": false, "inputs": {"str": "bbaa"}}, {"idx": 8, "outputs": false, "inputs": {"str": "11001000"}}, {"idx": 9, "outputs": false, "inputs": {"str": "ZWXv te"}}]