LeetCode 852. Peak Index in a Mountain Array in F#

URL Peak Index in a Mountain Array - LeetCode Code https://github.com/syohex/dotnet-study/tree/master/fsharp/leetcode/problems/0852/main.fsx let peakIndexInMountainArray (arr: int list) : int = let rec peakIndexInMountainArray' (arr: int[]) left ...