27 lines
776 B
Python
27 lines
776 B
Python
class Solution:
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def permute(self,nums: list[int]) -> list[list[int]]:
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length = len(nums)
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l = [i for i in range(length)]
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permute = []
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s = set()
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def get_permute(l, num, length, s, cur):
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if num == length:
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permute.append(cur)
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return
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for i in range(length):
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if i not in s:
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s.add(i)
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cur.append(i)
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get_permute(l, num+1, length, s, cur.copy())
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cur.pop()
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s.remove(i)
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get_permute(l,0,length, s, cur=[])
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rlt = []
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for li in permute:
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rlt.append([nums[i] for i in li])
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return rlt
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sol = Solution()
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print(sol.permute([1, 2, 3]))
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