Package g2601_2700.s2663_lexicographically_smallest_beautiful_string

Class Solution

java.lang.Object
g2601_2700.s2663_lexicographically_smallest_beautiful_string.Solution
public class Solution extends java.lang.Object
2663 - Lexicographically Smallest Beautiful String.

Hard

A string is beautiful if:

  • It consists of the first k letters of the English lowercase alphabet.
  • It does not contain any substring of length 2 or more which is a palindrome.

You are given a beautiful string s of length n and a positive integer k.

Return the lexicographically smallest string of length n, which is larger than s and is beautiful. If there is no such string, return an empty string.

A string a is lexicographically larger than a string b (of the same length) if in the first position where a and b differ, a has a character strictly larger than the corresponding character in b.

  • For example, "abcd" is lexicographically larger than "abcc" because the first position they differ is at the fourth character, and d is greater than c.

Example 1:

Input: s = “abcz”, k = 26

Output: “abda”

Explanation:

The string “abda” is beautiful and lexicographically larger than the string “abcz”.

It can be proven that there is no string that is lexicographically larger than the string “abcz”, beautiful, and lexicographically smaller than the string “abda”.

Example 2:

Input: s = “dc”, k = 4

Output: ""

Explanation: It can be proven that there is no string that is lexicographically larger than the string “dc” and is beautiful.

Constraints:

  • 1 <= n == s.length <= 105
  • 4 <= k <= 26
  • s is a beautiful string.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.lang.String
    smallestBeautifulString(java.lang.String s, int k)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • smallestBeautifulString

      public java.lang.String smallestBeautifulString(java.lang.String s, int k)