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4e11f40 · Aug 7, 2020

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0046.Permutations

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题目

Given a collection of distinct integers, return all possible permutations.

Example:

Input: [1,2,3]
Output:
[
  [1,2,3],
  [1,3,2],
  [2,1,3],
  [2,3,1],
  [3,1,2],
  [3,2,1]
]

题目大意

给定一个没有重复数字的序列,返回其所有可能的全排列。

解题思路

  • 求出一个数组的排列组合中的所有排列,用 DFS 深搜即可。