Leetcode Problem 440. K-th Smallest in Lexicographical Order

440. K-th Smallest in Lexicographical Order

Leetcode Solutions

Finding the k-th Smallest Lexicographical Number Using a Denary Tree Approach

  1. Initialize currNum as 1 (root of the denary tree).
  2. Decrement k by 1 since we start from the root node which is the first number.
  3. While k is greater than 0: a. Calculate the gap between currNum and currNum + 1 using the getGap function. b. If the gap is less than or equal to k, increment currNum and decrement k by the gap. c. If the gap is greater than k, multiply currNum by 10 (move to the first child) and decrement k by 1.
  4. Return currNum as the k-th smallest lexicographical number.
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Brute Force Lexicographical Sorting

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