52 lines
1.0 KiB
Python
52 lines
1.0 KiB
Python
# 经典递归求解问题:
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# 1. 迷宫寻路
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# 2. 汉诺塔(梵塔)
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# 3. 骑士周游
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# 4. 八皇后
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def f(n: int, m=1) -> int:
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if n == 0 or n == 1:
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return m
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return f(n - 1, n * m)
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def sum(n: int) -> int:
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if n == 1:
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return 1
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return n + sum(n - 1)
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def steps(n: int, m={}) -> int:
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if n < 0:
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return 0
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elif n == 0:
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return 1
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else:
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try:
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return m[n]
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except:
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m[n] = steps(n - 1) + steps(n - 2) + steps(n - 3)
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return m[n]
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def list_depth(items: list) -> int:
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max_depth = 1 if isinstance(items, list) else 0
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if max_depth:
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for item in items:
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if isinstance(item, list):
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max_depth = max(max_depth, list_depth(item) + 1)
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return max_depth
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def main():
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mylist = [1, ['a', ['b', ['c']]],[100, [200, 300, [400, [500, [600, [700]]]]]]]
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thylist = [[], [[[]]], [[], []]]
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print(list_depth(mylist))
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print(list_depth(thylist))
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if __name__ == '__main__':
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main()
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