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hello-algo/en/codes/python/chapter_dynamic_programming/climbing_stairs_dfs.py
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Yudong Jin 2778a6f9c7 Translate all code to English (#1836)
* Review the EN heading format.

* Fix pythontutor headings.

* Fix pythontutor headings.

* bug fixes

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* Revisit the CN-to-EN translation for Python code using Claude-4.5

* Revisit the CN-to-EN translation for Java code using Claude-4.5

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* Fix the dictionary.

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* Add the EN version of Dart code.

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* Add the EN version of JavaScript code.

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* Fix the workflows.

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2025-12-31 07:44:52 +08:00

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Python

"""
File: climbing_stairs_dfs.py
Created Time: 2023-06-30
Author: krahets (krahets@163.com)
"""
def dfs(i: int) -> int:
"""Search"""
# Known dp[1] and dp[2], return them
if i == 1 or i == 2:
return i
# dp[i] = dp[i-1] + dp[i-2]
count = dfs(i - 1) + dfs(i - 2)
return count
def climbing_stairs_dfs(n: int) -> int:
"""Climbing stairs: Search"""
return dfs(n)
"""Driver Code"""
if __name__ == "__main__":
n = 9
res = climbing_stairs_dfs(n)
print(f"Climbing {n} stairs has {res} solutions")