Leetcode Problem 60. Permutation Sequence

60. Permutation Sequence

Leetcode Solutions

Approach: Factorial Number System

  1. Initialize an array nums containing numbers from 1 to n.
  2. Compute factorial values for each base from 0 to (n - 1)! and store them in an array.
  3. Decrease k by 1 to fit into the range from 0 to n! - 1.
  4. For each factorial base starting from (n - 1)! down to 1!: a. Determine the index for the current base by dividing k by the factorial value. b. Select the element at this index from nums and append it to the result. c. Remove the selected element from nums. d. Update k to be the remainder of the division.
  5. Append the last remaining element in nums to the result.
  6. Return the result as a string.
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Approach: Backtracking to Generate Permutations

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