Last active
September 29, 2020 18:26
-
-
Save SteveGilham/23352205fc2ec9a801e4986f85c9d623 to your computer and use it in GitHub Desktop.
Puzzle solver
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
open System | |
open System.IO | |
let words = File.ReadAllLines(@".\brit-a-z.txt") | |
|> Array.filter (fun x -> x.IndexOf('\'') < 0) | |
let nines = words | |
|> Array.filter (fun x -> x.StartsWith("a")) | |
|> Array.filter (fun x -> x.Length = 9) | |
printfn "%d candidate words" nines.Length | |
let fives = words | |
|> Array.filter (fun x -> x.Length = 5) | |
printfn "%d candidate sub-words" fives.Length | |
let bag (x : String) = x |> Seq.cast<Char> | |
let takeChar (c : Char) (l : Char seq) = | |
let head = Seq.takeWhile (fun h -> h <> c) l | |
let tail = Seq.skipWhile (fun t -> t <> c) l | |
if Seq.isEmpty tail then None | |
else Some (Seq.concat [| head ; tail |> Seq.skip 1 |] ) | |
let takeChars (l : Char seq) (c : Char seq) = | |
Seq.fold (fun l' c' -> Option.bind (takeChar c') l') (Some(l)) c | |
let solutions (t9 : Char seq) = | |
let l5 = fives | |
|> Array.filter (fun x -> let s = bag x | |
(takeChars t9 s) |> Option.isSome) | |
let matches = l5 | |
|> Seq.map (fun x -> l5 | |
|> Array.filter (fun y -> (x.Chars 2) = (y.Chars 0)) | |
|> Array.filter (fun y -> let sy = bag y | |
let sx = bag x | |
let all = Seq.concat [| sy ; sx |] |> Seq.skip 1 | |
(takeChars t9 all) |> Option.isSome) | |
|> Array.map (fun y -> (x, y))) | |
|> Seq.concat | |
matches |> Seq.toList | |
let suitable (t9 : string) = | |
match solutions (bag t9) with | |
| x :: [] -> Some (t9, x) | |
| _ -> None | |
printfn "%A" (suitable "supernova") | |
let sw1 = System.Diagnostics.Stopwatch.StartNew() | |
let total = nines | |
|> Seq.choose suitable | |
|> Seq.map (fun x -> printfn "%A" x | |
x) | |
|> Seq.length | |
printfn "%A" total | |
sw1.Stop() | |
printfn "%A" (sw1.Elapsed) | |
;; | |
//9 | |
//00:00:10.3040735 | |
//161 | |
//00:02:09.9284476 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment