LeetCode 389. Find the Difference in F#

URL https://leetcode.com/problems/find-the-difference/ Code https://github.com/syohex/dotnet-study/tree/master/fsharp/leetcode/problems/0389/main.fsx let strToMap (s: string) : Map<char, int> = s |> Seq.toList |> List.fold (fun m ...