Can't compare sequences directly

diff --git a/AdventOfCode2017/Day4.fs b/AdventOfCode2017/Day4.fs
index 9b73bf7..c71ec77 100644 (file)
--- a/AdventOfCode2017/Day4.fs
+++ b/AdventOfCode2017/Day4.fs
@@ -8,6 +8,6 @@ let forallDistinctPairs (f : string -> string -> bool) (pp : string) =
     ] |> List.forall not
 
 let passphraseValid = forallDistinctPairs (=)
-let isAnagram w1 w2 = Seq.sort w1 = Seq.sort w2
+let isAnagram w1 w2 = Seq.compareWith (compare) (Seq.sort w1) (Seq.sort w2) = 0
 let passphraseValidAnagram = forallDistinctPairs isAnagram
 let nbPassphrasesValid (f : string -> bool) = Seq.map f >> Seq.sumBy (fun v -> if v then 1 else 0)
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