LeetCode 637. Average of Levels in Binary Tree in F#

URL https://leetcode.com/problems/average-of-levels-in-binary-tree/ Code https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/0637/main.fsx type Tree = | Leaf | Node of int * Tree * Tree let averageOfLevels (root: Tree...