title: Count Of Occurrences Of A 101 Pattern In A String
signature: function count_of_occurrences_of_a_101_pattern_in_a_string(s)
source_py: def count_of_occurrences_of_a_101_pattern_in_a_string(s):
      length = len(s)
      oneSeen = False
      count = 0
      for i in range(length):
          if ((s[i] == '1') and oneSeen):
              if (s[(i - 1)] == '0'):
                  count += 1
          if ((s[i] == '1') and (oneSeen == 0)):
              oneSeen = True
          if ((s[i] != '0') and (s[i] != '1')):
              oneSeen = False
      return count
source_cpp: int count_of_occurrences_of_a_101_pattern_in_a_string(string str) {
    int len = str . size ( );
    bool oneSeen = 0;
    int count = 0;
    for ( int i = 0;
    i < len;
    i ++ ) {
      if ( str [ i ] == '1' && oneSeen == 1 ) if ( str [ i - 1 ] == '0' ) count ++;
      if ( str [ i ] == '1' && oneSeen == 0 ) {
        oneSeen = 1;
        continue;
      }
      if ( str [ i ] != '0' && str [ i ] != '1' ) oneSeen = 0;
    }
    return count;
  }
question_info.entry_fn_name: count_of_occurrences_of_a_101_pattern_in_a_string
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(s, expected)
      local exec_result;
      local status, error_msg = pcall(function () 
          exec_result=PLACEHOLDER_FN_NAME(s) 
      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("1001ab010abc01001", 2)
      print(string.format("TEST-0...%s",result))
  
      result = driver("1001010001", 3)
      print(string.format("TEST-1...%s",result))
  
      result = driver("010100010100", 3)
      print(string.format("TEST-2...%s",result))
  
      result = driver("DLCu", 0)
      print(string.format("TEST-3...%s",result))
  
      result = driver("7072430592", 0)
      print(string.format("TEST-4...%s",result))
  
      result = driver("011", 0)
      print(string.format("TEST-5...%s",result))
  
      result = driver("pnJpypYOza", 0)
      print(string.format("TEST-6...%s",result))
  
      result = driver("1037", 0)
      print(string.format("TEST-7...%s",result))
  
      result = driver("111", 0)
      print(string.format("TEST-8...%s",result))
  
      result = driver("HxK", 0)
      print(string.format("TEST-9...%s",result))
  
  end
  
  main()
question_info.test_list: [{"idx": 0, "outputs": 2, "inputs": {"s": "1001ab010abc01001"}}, {"idx": 1, "outputs": 3, "inputs": {"s": "1001010001"}}, {"idx": 2, "outputs": 3, "inputs": {"s": "010100010100"}}, {"idx": 3, "outputs": 0, "inputs": {"s": "DLCu"}}, {"idx": 4, "outputs": 0, "inputs": {"s": "7072430592"}}, {"idx": 5, "outputs": 0, "inputs": {"s": "011"}}, {"idx": 6, "outputs": 0, "inputs": {"s": "pnJpypYOza"}}, {"idx": 7, "outputs": 0, "inputs": {"s": "1037"}}, {"idx": 8, "outputs": 0, "inputs": {"s": "111"}}, {"idx": 9, "outputs": 0, "inputs": {"s": "HxK"}}]