From dc000f31a12df11c9082b55ddf7c077c3c6bbe42 Mon Sep 17 00:00:00 2001
From: Fazeel Usmani <fazeelusmani18@gmail.com>
Date: Mon, 8 Nov 2021 14:44:56 +0530
Subject: [PATCH] Create 8_uniqueBST.cpp

---
 11 November Leetcode Challenge 2021/8_uniqueBST.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 11 November Leetcode Challenge 2021/8_uniqueBST.cpp

diff --git a/11 November Leetcode Challenge 2021/8_uniqueBST.cpp b/11 November Leetcode Challenge 2021/8_uniqueBST.cpp
new file mode 100644
index 0000000..1a14589
--- /dev/null
+++ b/11 November Leetcode Challenge 2021/8_uniqueBST.cpp	
@@ -0,0 +1,9 @@
+class Solution {
+public:
+    int numTrees(int n) {
+        long ans = 1;
+        for(int i = 0; i < n; i++) 
+            ans *= (4*i+2) / (i+2.);
+        return ans;
+    }
+};