题解 | #没有重复项数字的全排列#
没有重复项数字的全排列
https://www.nowcoder.com/practice/4bcf3081067a4d028f95acee3ddcd2b1
# # 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 # # @param num int整型一维数组 # @return int整型二维数组 # class Solution: def permute(self , num: List[int]) -> List[List[int]]: if len(num) <= 1: return [num] a = num[0] result = self.permute(num[1:]) new_result = [] for i in range(len(result)): tmp = result[i] new_result.append([a] + tmp) new_result.append(tmp + [a]) for j in range(len(tmp)-1): new_result.append(tmp[:j+1] + [a] + tmp[j+1:]) return new_result