Given a collection of distinct numbers, return all possible permutations.
For example,
[1,2,3]
have the following permutations:
[
[1,2,3],
[1,3,2],
[2,1,3],
[2,3,1],
[3,1,2],
[3,2,1]
]
按照手写排列的思路,编写递归程序即可。
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Given a collection of distinct numbers, return all possible permutations.
For example,
[1,2,3]
have the following permutations:
[
[1,2,3],
[1,3,2],
[2,1,3],
[2,3,1],
[3,1,2],
[3,2,1]
]
按照手写排列的思路,编写递归程序即可。