{ "data": { "question": { "questionId": "60", "questionFrontendId": "60", "boundTopicId": null, "title": "Permutation Sequence", "titleSlug": "permutation-sequence", "content": "

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

\n\n

By listing and labeling all of the permutations in order, we get the following sequence for n = 3:

\n\n
    \n\t
  1. "123"
    2. \n\t
  2. "132"
    3. \n\t
  3. "213"
    4. \n\t
  4. "231"
    5. \n\t
  5. "312"
    6. \n\t
  6. "321"
    7. \n
\n\n

Given n and k, return the kth permutation sequence.

\n\n

 

\n

Example 1:

\n
Input: n = 3, k = 3\nOutput: \"213\"\n

Example 2:

\n
Input: n = 4, k = 9\nOutput: \"2314\"\n

Example 3:

\n
Input: n = 3, k = 1\nOutput: \"123\"\n
\n

 

\n

Constraints:

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