StaffTrie
K-th Smallest in Lexicographical Order
Given two integers n and k, return the k^th lexicographically smallest integer in the range [1, n].
Example 1
Input
n = 13, k = 2Output
10The lexicographical order is [1, 10, 11, 12, 13, 2, 3, 4, 5, 6, 7, 8, 9], so the second smallest number is 10.
Example 2
Input
n = 1, k = 1Output
1The only integer in the range is 1, so the first lexicographically smallest integer is 1.
Constraints
- 1 <= k <= n <= 10^9