LeetCode 532. K-diff Pairs in an Array in F#

URL https://leetcode.com/problems/k-diff-pairs-in-an-array/ Code https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/0532/main.fsx let toMap (nums: int list) : Map<int, int> = let rec toMap' nums m = match nums wit...