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29 lines
542 B
29 lines
542 B
"""
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File: climbing_stairs_dfs.py
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Created Time: 2023-06-30
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Author: krahets (krahets@163.com)
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"""
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def dfs(i: int) -> int:
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"""搜尋"""
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# 已知 dp[1] 和 dp[2] ，返回之
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if i == 1 or i == 2:
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return i
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# dp[i] = dp[i-1] + dp[i-2]
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count = dfs(i - 1) + dfs(i - 2)
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return count
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def climbing_stairs_dfs(n: int) -> int:
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"""爬樓梯：搜尋"""
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return dfs(n)
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"""Driver Code"""
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if __name__ == "__main__":
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n = 9
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res = climbing_stairs_dfs(n)
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print(f"爬 {n} 階樓梯共有 {res} 種方案")
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