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author冯昶 <seaker@qq.com>2021-05-17 16:50:52 +0800
committer冯昶 <seaker@qq.com>2021-05-17 16:50:52 +0800
commit52b089976d2ad69babbca7efe0e290da1883c919 (patch)
tree0008e0f7693348515fe816f9840a3920df830647 /challenge-112/colin-crain/python/ch-2.py
parent39771602bbd0b42d1b5c1bb50049b84536243683 (diff)
parentc3cd45087006d3f63b05219b8280a25dc1ea7ba9 (diff)
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Merge remote-tracking branch 'upstream/master'
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diff --git a/challenge-112/colin-crain/python/ch-2.py b/challenge-112/colin-crain/python/ch-2.py
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+#!/usr/bin/env python3
+#
+#
+# one-two-up-we-go.py
+#
+#
+#
+# © 2021 colin crain
+## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ##
+
+
+
+from functools import lru_cache
+
+@lru_cache(maxsize = 1000)
+def fib(n):
+ if n < 0:
+ return None
+ if n < 2:
+ return n
+ else:
+ return fib(n-1) + fib(n-2)
+
+
+for i in range(2, 21):
+ ways = fib(i+1)
+ print(f"for {i} steps there are {ways} ways to climb them")