Update 543_diameter_of_binary_tree.md

Joseph Luce · web-flow · commit 31e76311c2be · 2019-07-26T00:53:23.000-07:00
diff --git a/leetcode/easy/543_diameter_of_binary_tree.md b/leetcode/easy/543_diameter_of_binary_tree.md
@@ -2,8 +2,9 @@
 
 ## Best Solution
 - Runtime: O(N)
-- Space: O(N)
+- Space: O(H)
 - N = Number of nodes in binary tree
+- H = Height of the tree
 
 Take this binary tree example:
 ```
