From d8f3b40085619cb680c8f227c65a1f5acc393223 Mon Sep 17 00:00:00 2001 From: crupest Date: Tue, 23 Feb 2021 21:07:19 +0800 Subject: Move leetcode solutions to subdir. --- cpp/96.cpp | 14 -------------- 1 file changed, 14 deletions(-) delete mode 100644 cpp/96.cpp (limited to 'cpp/96.cpp') diff --git a/cpp/96.cpp b/cpp/96.cpp deleted file mode 100644 index a67a59a..0000000 --- a/cpp/96.cpp +++ /dev/null @@ -1,14 +0,0 @@ -class Solution { -public: - // catalan number: - // f(n) = f(0) * f(n-1) + f(1) * f(n-2) + ... + f(n-1)*f(0) - // f(n) = 2(2n-1) * f(n-1) / (n+1) - // f(n) = C(2n, n) / (n+1) - int numTrees(int n) { - long long result = 1; - for (int i = 2; i <= n; i++) { - result = 2 * (2 * i - 1) * result / (i + 1); - } - return result; - } -}; -- cgit v1.2.3