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authorYuqian Yang <crupest@crupest.life>2025-02-28 23:13:39 +0800
committerYuqian Yang <crupest@crupest.life>2025-02-28 23:13:39 +0800
commitdc1f0c4c0096013799416664894c5194dc7e1f52 (patch)
tree2f5d235f778cd720f4c39ec3e56b77ba6d99f375 /works/solutions/leetcode/cpp/96.cpp
parent7299d424d90b1effb6db69e3476ddd5af72eeba4 (diff)
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chore(store): move everything to store.
Diffstat (limited to 'works/solutions/leetcode/cpp/96.cpp')
-rw-r--r--works/solutions/leetcode/cpp/96.cpp14
1 files changed, 0 insertions, 14 deletions
diff --git a/works/solutions/leetcode/cpp/96.cpp b/works/solutions/leetcode/cpp/96.cpp
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--- a/works/solutions/leetcode/cpp/96.cpp
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@@ -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;
- }
-};