LeetCode 1329. Sort the Matrix Diagonally in F#

URL https://leetcode.com/problems/sort-the-matrix-diagonally/ Code https://github.com/syohex/dotnet-study/tree/master/fsharp/leetcode/problems/1329/main.fsx let diagonalSort (mat: int [,]) : int [,] = let mutable m: Map<int, int list> = Map.empty...