title: Number Subsequences Form Ai Bj Ck
signature: function number_subsequences_form_ai_bj_ck(s)
source_py: def number_subsequences_form_ai_bj_ck(s):
      aCount = 0
      bCount = 0
      cCount = 0
      for i in range(len(s)):
          if (s[i] == 'a'):
              aCount = (1 + (2 * aCount))
          elif (s[i] == 'b'):
              bCount = (aCount + (2 * bCount))
          elif (s[i] == 'c'):
              cCount = (bCount + (2 * cCount))
      return cCount
source_cpp: int number_subsequences_form_ai_bj_ck(string s) {
    int aCount = 0;
    int bCount = 0;
    int cCount = 0;
    for ( unsigned int i = 0;
    i < s . size ( );
    i ++ ) {
      if ( s [ i ] == 'a' ) aCount = ( 1 + 2 * aCount );
      else if ( s [ i ] == 'b' ) bCount = ( aCount + 2 * bCount );
      else if ( s [ i ] == 'c' ) cCount = ( bCount + 2 * cCount );
    }
    return cCount;
  }
question_info.entry_fn_name: number_subsequences_form_ai_bj_ck
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("", 0)
      print(string.format("TEST-0...%s",result))
  
      result = driver("abbc", 3)
      print(string.format("TEST-1...%s",result))
  
      result = driver("abcabc", 7)
      print(string.format("TEST-2...%s",result))
  
      result = driver("agsdbkfdc ", 1)
      print(string.format("TEST-3...%s",result))
  
      result = driver("ababab", 0)
      print(string.format("TEST-4...%s",result))
  
      result = driver("aaaaaaa", 0)
      print(string.format("TEST-5...%s",result))
  
      result = driver("aabaaabcc", 111)
      print(string.format("TEST-6...%s",result))
  
      result = driver("19", 0)
      print(string.format("TEST-7...%s",result))
  
      result = driver("1001100", 0)
      print(string.format("TEST-8...%s",result))
  
      result = driver("DtAnuQbU", 0)
      print(string.format("TEST-9...%s",result))
  
  end
  
  main()
question_info.test_list: [{"idx": 0, "outputs": 0, "inputs": {"s": ""}}, {"idx": 1, "outputs": 3, "inputs": {"s": "abbc"}}, {"idx": 2, "outputs": 7, "inputs": {"s": "abcabc"}}, {"idx": 3, "outputs": 1, "inputs": {"s": "agsdbkfdc "}}, {"idx": 4, "outputs": 0, "inputs": {"s": "ababab"}}, {"idx": 5, "outputs": 0, "inputs": {"s": "aaaaaaa"}}, {"idx": 6, "outputs": 111, "inputs": {"s": "aabaaabcc"}}, {"idx": 7, "outputs": 0, "inputs": {"s": "19"}}, {"idx": 8, "outputs": 0, "inputs": {"s": "1001100"}}, {"idx": 9, "outputs": 0, "inputs": {"s": "DtAnuQbU"}}]