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authorVincent Ambo <mail@tazj.in>2021-12-13T22·51+0300
committerVincent Ambo <mail@tazj.in>2021-12-13T23·15+0300
commit019f8fd2113df4c5247c3969c60fd4f0e08f91f7 (patch)
tree76a857f61aa88f62a30e854651e8439db77fd0ea /users/wpcarro/scratch/facebook/nth-fibonacci.py
parent464bbcb15c09813172c79820bcf526bb10cf4208 (diff)
parent6123e976928ca3d8d93f0b2006b10b5f659eb74d (diff)
subtree(users/wpcarro): docking briefcase at '24f5a642' r/3226
git-subtree-dir: users/wpcarro
git-subtree-mainline: 464bbcb15c09813172c79820bcf526bb10cf4208
git-subtree-split: 24f5a642af3aa1627bbff977f0a101907a02c69f
Change-Id: I6105b3762b79126b3488359c95978cadb3efa789
Diffstat (limited to 'users/wpcarro/scratch/facebook/nth-fibonacci.py')
-rw-r--r--users/wpcarro/scratch/facebook/nth-fibonacci.py13
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diff --git a/users/wpcarro/scratch/facebook/nth-fibonacci.py b/users/wpcarro/scratch/facebook/nth-fibonacci.py
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+++ b/users/wpcarro/scratch/facebook/nth-fibonacci.py
@@ -0,0 +1,13 @@
+# 0, 1, 1, 2, 3, 5
+def fib(n):
+    if n < 0:
+        raise Exception("Need to supply an index that's >= 0. Not: {}".format(n))
+    elif n in {0, 1}:
+        return n
+    state = [0, 1]
+    for i in range(1, n):
+        state[0], state[1] = state[1], state[0] + state[1]
+    return state[-1]
+
+for i in range(10):
+    print("fib({}) => {}".format(i, fib(i)))