let ``No.24 数当てゲーム``()=
  let mutable sNo = Set.empty
  let mutable sYs = Set.empty
  let mutable mYs = Map.empty
  let N = stdin.ReadLine() |> int

  let (|YES|NO|) arg = if (string arg) = "YES" then YES else NO

  for i in [1..N] do
    stdin.ReadLine().Split(' ')
    |> fun args ->
      match (args.[4]) with
      | NO -> 
        for i in [0..3] do
          sNo <- sNo.Add( args.[i] |> int )
      | YES-> 
        for i in [0..3] do
          let ct = 1 + if args.[i]|> int |> mYs.ContainsKey 
                    then mYs.[args.[i]|>int] 
                    else 0
          mYs <- mYs.Add( args.[i]|>int, ct )
          match  sNo |> Set.contains  (args.[i] |> int) with
          | true -> ()
          | _    -> sYs <- sYs.Add( args.[i] |> int )

  match sYs.Count, sNo.Count with
  | 0 , _ -> 45 - ( sNo 
             |> Set.toList
             |> List.sum )
             |> stdout.WriteLine 
  | _ , _ ->  Set.difference sYs sNo
              |> Set.toList
              |> List.maxBy (fun n -> mYs.[n] )
              |> stdout.WriteLine

``No.24 数当てゲーム``()