From 97d0bca7470bef068b5852a94c5e51c103b0400c Mon Sep 17 00:00:00 2001
From: Tarcisio-Teixeira
Date: Sun, 23 Oct 2022 16:48:02 -0700
Subject: Create fib.py

---
 entries/Tarcisio-Teixeira/fib.py | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 entries/Tarcisio-Teixeira/fib.py

(limited to 'entries/Tarcisio-Teixeira')

diff --git a/entries/Tarcisio-Teixeira/fib.py b/entries/Tarcisio-Teixeira/fib.py
new file mode 100644
index 0000000..1246517
--- /dev/null
+++ b/entries/Tarcisio-Teixeira/fib.py
@@ -0,0 +1,5 @@
+def fib(n,arr={},v =-1):
+    if v>=0:
+        arr[n]=v
+        return v
+    return arr[n] if n in arr.keys() else fib(n, arr, (3*n*n*n - 9*n*n+13*n)//6 if  n <= 3 else fib(n//2-1,arr)*fib(n-n//2,arr) + fib(n//2,arr)*fib(n-n//2+1,arr))
-- 
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