update README

Rabbittee · Aug 26, 2021 · 5143494 · 5143494
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commit 5143494
Showing 1 changed file with 10 additions and 1 deletion.
diff --git a/2021-08/2021-08-26 (day39)/White/README.md b/2021-08/2021-08-26 (day39)/White/README.md
@@ -3,4 +3,13 @@ Runtime: 43 ms, faster than 6.96% of Python3 online submissions for Climbing Sta
 Memory Usage: 14.3 MB, less than 44.80% of Python3 online submissions for Climbing Stairs.
 
 # fibonacci
-https://en.wikipedia.org/wiki/Fibonacci_number
+https://en.wikipedia.org/wiki/Fibonacci_number
+
+# 數學公式解
+```python
+from math import sqrt
+class Solution:
+    def climbStairs(self, n: int) -> int:
+        n = n + 1
+        return math.floor(((1+sqrt(5))**n-(1-sqrt(5))**n)/(2**n*sqrt(5)))
+```