leetcode 60. Permutation Sequence (求第k个排列)

The set [1,2,3,,<i>n</i>] contains a total of n! unique permutations.

By listing and labeling all of the permutations in order,
We get the following sequence (ie, for n = 3):

  1. "123"
  2. "132"
  3. "213"
  4. "231"
  5. "312"
  6. "321"

Given n and k, return the kth permutation sequence.

Note: Given n will be between 1 and 9 inclusive.

 

思路:还是根据leetcode 31 解题报告 中的算法搞一下就好了。。

 

作者: CrazyKK

ex-ACMer@hust,stackoverflow-engineer@sensetime

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