LeetCode 1814. Count Nice Pairs in an Array in F#

URL Count Nice Pairs in an Array - LeetCode Code https://github.com/syohex/dotnet-study/tree/master/fsharp/leetcode/problems/1814/main.fsx let rev (n: int) : int = let rec rev' n acc = if n <= 0 then acc else rev' (n / 10) (acc * 10 + (n ...